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WorksheetsVCE Unit 1 Biology Review 2022+
Total questions: 218
Worksheet time: 2hrs 22mins
Which of the following statements is NOT part of the Cell Theory?
All organisms are composed of cells.
All cells come from pre-existing cells.
The cell is the smallest and most basic unit of life.
Cells can spontaneously generate.
Which type of cells lack a nucleus and membrane-bound organelles?
Eukaryotes
Prokaryotes
Multicellular organisms
Unicellular organisms
Which kingdoms contain cells with a nucleus and membrane-bound organelles?
Monera
Animalia, Plantae, Fungi, Protista
Archaea
Eukarya
What is the second highest taxonomic rank in biology?
Domain
Kingdom
Phylum
Class
What term describes organisms consisting of a single cell?
Multicellular
Unicellular
Eukaryotic
Prokaryotic
What is the fluid called that surrounds the cells of multicellular organisms?
Intracellular fluid
Cytoplasm
Internal environment
Extracellular fluid
What is the fluid inside the cell, also referred to as the cytoplasm?
Extracellular fluid
Internal environment
Intracellular fluid
Non-plasma membrane
Which ratio is important for the efficiency of substance transport in cells?
Volume to Surface Area ratio
Surface Area to Volume ratio
Concentration to Temperature ratio
Temperature to Concentration ratio
What forms the boundaries of discrete compartments within the cell?
Plasma membrane
Non-plasma membrane
Cytoplasm
Extracellular fluid
Which of the following is NOT a criterion for a cell to be classified as biotic?
Movement
Respiration
Sensitivity
Inactivity
What is the term for maintaining a stable internal environment within a narrow range of limits?
Cellular respiration
Homeostasis
Anaerobic respiration
Biotic balance
What are the inputs for cellular respiration?
Glucose and carbon dioxide
Oxygen and water
Glucose and oxygen
Water and energy (ATP)
What is the process called in which incomplete oxidation of glucose occurs in the absence of oxygen?
Cellular respiration
Homeostasis
Anaerobic respiration
Biotic balance
What does the endosymbiotic theory propose?
Eukaryotic cell organelles evolved from free-living prokaryotes.
Prokaryotic cells evolved from eukaryotic cells.
All cells are derived from a common ancestor.
Organelles in eukaryotic cells are not membrane-bound.
What is the main function of cell compartmentalisation?
To allow cells to move freely.
To separate membrane-bound organelles for more efficient functioning.
To increase the size of the cell.
To decrease the number of organelles in the cell.
What is a chromosome made up of?
Proteins and RNA.
Lipids and carbohydrates.
Proteins and DNA.
RNA and carbohydrates.
What is a chromatid?
A full chromosome before replication.
One half of a duplicated chromosome.
A type of protein found in the nucleus.
A type of RNA molecule.
Which of the following is NOT found in prokaryotic cells?
Nucleoid (DNA)
Plasmid
Endoplasmic reticulum
Cell wall
Which organelle is responsible for energy production in eukaryotic cells?
Lysosome
Mitochondria
Golgi apparatus
Vacuole
Which structure is present in plant cells but not in animal cells?
Mitochondrion
Chloroplast
Nucleus
Ribosome
What is the function of the plasma membrane in a cell?
It gives plant cells support and prevents them from bursting.
It controls what goes in and out of the cell.
It contains all the DNA, RNA, chromatin, and chromosomes.
It produces spindle fibers for cell division.
Which organelle is responsible for giving plant cells support and preventing them from bursting?
Cell Wall
Cytoplasm
Nucleus
Mitochondrion
What is the main function of the nucleus in a cell?
It synthesizes lipids, phospholipids, and steroids.
It contains all the DNA, RNA, chromatin, and chromosomes.
It is involved in protein and lipid synthesis, modification, and transport.
It produces ATP through cellular respiration.
Which organelle is known as the site of cellular respiration and produces ATP?
Ribosomes
Golgi Apparatus
Mitochondrion
Lysosomes
What is the function of ribosomes in a cell?
They are involved in protein synthesis.
They contain powerful digestive enzymes.
They store materials like food, waste, and water.
They pack proteins into vesicles for transport.
Which organelle contains the light-trapping pigment chlorophyll and is the site of photosynthesis?
Chloroplasts
Lysosomes
Vacuoles
Endoplasmic Reticulum
What is the function of the Golgi Apparatus in a cell?
It produces spindle fibers for cell division.
It packs proteins into vesicles for transport.
It synthesizes lipids, phospholipids, and steroids.
It contains all the DNA, RNA, chromatin, and chromosomes.
Which organelle is involved in the synthesis and modification of proteins and has ribosomes attached to it?
Smooth ER (SER)
Rough ER (RER)
Lysosomes
Vacuoles
What is the function of lysosomes in a cell?
They contain powerful digestive enzymes that break down debris and foreign material.
They store materials like food, waste, and water.
They are involved in protein and lipid synthesis, modification, and transport.
They produce ATP through cellular respiration.
Which organelle is described as a fluid-filled organelle that stores materials like food, waste, and water in plant cells?
Lysosomes
Vacuoles
Chloroplasts
Centrioles
What is the passive movement of molecules and particles along a concentration gradient, from a region of high concentration to a region of low concentration, called?
Active Transport
Simple Diffusion
Facilitated Diffusion
Endocytosis
Which type of transport requires a substance to be attached to a carrier molecule or pass through a protein channel to pass through the cell membrane without using energy?
Simple Diffusion
Active Transport
Facilitated Diffusion
Endocytosis
What is the term for the difference in concentration of solutes between two regions?
Osmosis
Concentration Gradient
Plasmolysis
Osmolarity
What type of transport involves molecules moving from an area of low concentration to an area of high concentration against the concentration gradient and requires ATP?
Simple Diffusion
Facilitated Diffusion
Active Transport
Osmosis
What is the process called when cells import molecules by vesicles fusing with the cell membrane?
Exocytosis
Endocytosis
Simple Diffusion
Facilitated Diffusion
Which term describes a substance that can dissolve other substances?
Solute
Solvent
Solution
Osmolarity
What is the movement of molecules from a place of low solute concentration to a place of high solute concentration through a semipermeable membrane until equilibrium is reached?
Active Transport
Simple Diffusion
Osmosis
Plasmolysis
What is the term for the total concentration of solutes in a solution?
Osmolarity
Plasmolysis
Flaccid
Turgid
What happens to a plant cell when it loses water and the vacuole shrinks?
It becomes turgid
It undergoes plasmolysis
It becomes flaccid
It undergoes osmosis
What is a plant cell called when it is full of water and cannot gain any more water?
Flaccid
Turgid
Plasmolysed
Osmolar
What is tonicity?
The ability of a surrounding solution to cause a cell to gain or lose water.
The ability of a cell to divide and reproduce.
The ability of a cell to produce energy.
The ability of a solution to change color.
What happens to a cell in an isotonic solution?
The cell gains water and swells.
The cell loses water and shrivels.
There is no net movement of water.
The cell bursts.
What happens to cells placed in hypertonic solutions?
They gain water and swell.
They lose water and become shriveled.
They remain the same.
They burst.
What happens to cells placed in hypotonic solutions?
They gain water and swell.
They lose water and become shriveled.
They remain the same.
They burst.
Which type of transport requires energy in the form of ATP?
Diffusion
Facilitated diffusion
Active transport
Osmosis
In which type of solution does an animal cell become lysed?
Isotonic
Hypertonic
Hypotonic
None of the above
In which type of solution does a plant cell become turgid?
Isotonic
Hypertonic
Hypotonic
None of the above
What is a phospholipid composed of?
A lipid containing a hydrophilic/polar phosphate head and 2 fatty acid hydrophobic tails
A lipid containing a hydrophobic/polar phosphate head and 2 fatty acid hydrophilic tails
A lipid containing a hydrophilic/polar phosphate head and 3 fatty acid hydrophobic tails
A lipid containing a hydrophobic/polar phosphate head and 3 fatty acid hydrophilic tails
What does the Fluid Mosaic Model describe?
A static structure of the cell membrane
A fluid structure of the membrane with various proteins embedded in or attached to a bilayer of phospholipids
A rigid structure of the cell membrane with no proteins
A fluid structure of the membrane with no proteins
What happens to cell membrane fluidity when temperature decreases?
Cell fluidity increases, and the cell becomes more flexible
Cell fluidity decreases, and the cell becomes rigid
Cell fluidity remains the same
Cell fluidity increases, and the cell becomes rigid
How does cholesterol function in regulating cell membrane fluidity?
Cholesterol increases membrane rigidity at high temperatures
Cholesterol acts as a spacer to keep phospholipids from moving too far apart at high temperatures
Cholesterol decreases membrane fluidity at low temperatures
Cholesterol acts as a spacer to keep phospholipids from moving too close together at high temperatures
What type of lipid composition do fish living in extremely cold environments have in their membranes?
High proportions of saturated lipids
High proportions of unsaturated lipids
Equal proportions of saturated and unsaturated lipids
No lipids
Which type of membrane protein penetrates the hydrophobic interior of the lipid bilayer?
Peripheral proteins
Integral proteins
Cholesterol
Phospholipids
What is the primary function of enzymes?
To bind to substrates
To act as organic catalysts
To change the shape of active sites
To denature proteins
What is the term for the area on the enzyme where the substrate fits into?
Substrate
Active site
Denaturation site
Hydrophobic region
What happens to most enzymes when they are boiled in water?
They become more active
They bind more substrates
They denature
They form new active sites
What is the role of peripheral proteins in the cell membrane?
They penetrate the lipid bilayer
They are loosely bound to the surface of the membrane
They span the membrane
They form the hydrophobic interior
Which kingdom includes multicellular organisms that are heterotrophic, lack cell walls, and exhibit movement at some stage of life?
Plantae
Animalia
Fungi
Protista
Which kingdom consists of organisms that possess cell walls made of cellulose and undergo photosynthesis to produce energy?
Fungi
Bacteria
Plantae
Chromista
Which kingdom includes heterotrophic eukaryotic organisms that absorb nutrients externally and reproduce through spores?
Protista
Fungi
Archaea
Chromista
Which kingdom is characterized by mostly unicellular organisms with diverse characteristics, ranging from autotrophic to heterotrophic?
Protista
Bacteria
Chromista
Archaea
Which kingdom includes single-celled prokaryotic organisms that lack membrane-bound organelles and reproduce through binary fission?
Archaea
Bacteria
Chromista
Fungi
Which kingdom includes single-celled prokaryotic organisms often found in extreme environments with unique cell membrane composition?
Bacteria
Protista
Archaea
Chromista
Which kingdom includes mostly aquatic organisms with diverse characteristics, possessing chloroplasts with chlorophyll c?
Chromista
Plantae
Fungi
Protista
What is the first and longest phase of the cell cycle, during which the cell spends 90% of its lifespan?
Prophase
Metaphase
Interphase
Telophase
Which stage of interphase is associated with chromosome duplication?
G1 phase
S phase
G2 phase
M phase
During which stage of mitosis do the chromosomes condense together in preparation for cell division?
Prophase
Metaphase
Anaphase
Telophase
In which stage of mitosis do spindle fibers form and attach to the centromere of each chromosome?
Prophase
Metaphase
Anaphase
Telophase
During which stage of mitosis do the spindle fibers contract and pull apart the sister chromatids?
Prophase
Metaphase
Anaphase
Telophase
What is the final stage of mitosis, where chromosomes pack together on either side of the cell and new nuclear membranes form?
Prophase
Metaphase
Anaphase
Telophase
What process refers to the actual separation of the cytoplasm and nuclear membranes, resulting in two identical daughter cells?
Prophase
Metaphase
Anaphase
Cytokinesis
In animal cells, what structure forms and pinches the cell into two new cells during cytokinesis?
Cell plate
Cleavage furrow
Spindle fibers
Centromere
In plant cells, what structure forms along the equator of the cell during cytokinesis?
Cleavage furrow
Spindle fibers
Cell plate
Centromere
What type of reproduction is binary fission?
Sexual reproduction
Asexual reproduction
Budding
Fragmentation
What is the acronym to remember the stages of binary fission?
DESS
DESC
DECS
DSEC
What does the 'S' in the acronym DESC stand for in the context of binary fission?
Septum formation
Separation
Synthesis
Segmentation
During which stage of binary fission does the cell elongate and the replicated circular chromosomes migrate to opposite ends?
DNA Replication
Elongation
Septum formation
Cell Division
What is the process called when the cell begins to pinch inwards and create a septum during binary fission?
Cytokinesis
Mitosis
Meiosis
Apoptosis
Which of the following is NOT a difference between binary fission and mitosis?
Binary fission happens in prokaryotic cells, mitosis occurs in eukaryotic cells
Chromosomes condense during binary fission
Centrioles do not separate chromosomes during binary fission
A nuclear membrane is not broken up in binary fission
Which of the following is always paired with adenine in DNA?
Cytosine
Guanine
Thymine
Uracil
What is the function of messenger RNA (mRNA)?
Combines with proteins to form ribosomes
Carries amino acids to the ribosomes during protein synthesis
Carries the code for protein synthesis to the ribosomes
Synthesizes proteins directly
Which of the following is NOT a type of RNA mentioned in the text?
Messenger RNA (mRNA)
Ribosomal RNA (rRNA)
Transfer RNA (tRNA)
Nuclear RNA (nRNA)
What is the complementary base pair for guanine in DNA?
Thymine
Adenine
Cytosine
Uracil
Which of the following statements is true about RNA?
True
False
What triggers programmed cell death (apoptosis) in the body?
External factors
Normal processes
Bacterial infection
Lack of nutrients
Which of the following is NOT a type of cell eliminated by apoptosis?
Cells with damaged DNA
Cells infected with a virus
Cells that are old
Healthy skin cells
Which of the following is an example of a cell that undergoes apoptosis?
Neurons in the brain
Lining of the uterus
Muscle cells
Red blood cells
What is the main difference between apoptosis and necrosis?
Apoptosis is triggered by external factors, while necrosis is triggered by normal processes.
Apoptosis is a form of cell death, while necrosis is a form of cell growth.
Apoptosis is triggered by normal processes, while necrosis is triggered by external factors.
Apoptosis occurs in healthy cells, while necrosis occurs in dead cells.
What role does cytochrome c play in the mitochondrial (intrinsic) pathway of apoptosis?
It binds to death receptor proteins.
It activates caspase enzymes.
It repairs damaged DNA.
It inhibits apoptosis.
Which pathway involves death signalling molecules binding to death receptor proteins on the cell surface?
Mitochondrial (intrinsic) pathway
Death receptor (extrinsic) pathway
Autophagy pathway
Necrosis pathway
What happens to the cell after apoptosis?
The cell grows larger.
The cell divides into two new cells.
Phagocytes engulf and digest the apoptotic bodies.
The cell repairs itself.
Which stage of apoptosis involves caspases entering the nucleus and cleaving DNA?
Activation of caspases
Digestion of cell contents
Cell shrinks
Membrane blebbing and breakage
What happens during the digestion of cell contents in apoptosis?
Caspases break down the organelles
The cell and nucleus shrink
The membrane warps and detaches
Caspases cleave DNA
What is the role of the G1 checkpoint in the cell cycle?
Inspects for DNA damage
Confirms that DNA has correctly replicated in S phase
Confirms that spindle fibres have correctly attached to the centromeres of chromosomes
Initiates apoptosis
Which checkpoint confirms that DNA has correctly replicated in the S phase?
G1
G2
Metaphase
Apoptosis
What is a characteristic of benign tumours?
They are relatively slow-growing masses
They invade nearby tissues and enter the bloodstream
They are cancerous due to their ability to migrate
They grow exponentially
What is a key feature of malignant tumours?
They are generally enclosed within a capsule
They can mutate further and invade nearby tissues
They are slow-growing
They do not enter the bloodstream
What is the significance of apoptosis in eukaryotic organisms?
It is vital to the healthy functioning and development
It causes deviant cell production
It prevents DNA replication
It stops spindle fibres from attaching to chromosomes
Which characteristic allows tumour cells to replicate without external growth signals?
Antigrowth deactivation
Increased survival
Self-sufficiency
Tissue invasion and metastasis
What happens to apoptosis in tumour cells?
It functions normally
It is deactivated
It functions correctly
It is enhanced
Which of the following statements about cells is incorrect?
Both prokaryotic and eukaryotic cells contain a cell membrane, cytoplasm and ribosomes.
Prokaryotic cells do not contain a membrane-bound nucleus.
Prokaryotic cells contain a membrane-bound nucleus.
There are many more prokaryotic cells on Earth than there are eukaryotic cells.
An organism was described as being made up of a single cell containing a membrane-bound nucleus and membrane-bound organelles.
Which of the following correctly identifies the organism being described?
A unicellular eukaryote
A unicellular prokaryote
A multicellular eukaryote
A multicellular prokaryote
A light microscope has an ocular lens magnification of 10× and a total magnification of 400×. Which of the following options correctly indicates the magnification of the objective lens?
10×
4000×
4×
40×
Which of the following options lists the different types of microscopes in order of increasing resolving power?
Light microscope, fluorescent microscope, transmission electron microscope, scanning electron microscope
Light microscope, fluorescent microscope, scanning electron microscope, transmission electron microscope
Fluorescent microscope, light microscope, transmission electron microscope, scanning electron microscope
Fluorescent microscope, light microscope,, scanning electron microscope, transmission electron microscope
Of the following types of microscope, which one would be used to produce three-dimensional representations of cell structure?
Transmission electron microscope
Compound light microscope
Fluorescent microscope
Confocal laser scanning microscope
The width of a human hair is approximately 100um.
Which of the following options correctly indicates this measurement in mm?
0.1mm
1000mm
10mm
1mm
Which of the following options correctly lists the organelles in a plant cell that can be seen with a light microscope that is typically used in schools?
Cell wall, nucleus, mitochondria, vacuole
Cell wall, nucleus, chloroplast, vacuole
Cell wall, nucleus, mitochondria, chloroplast, vacuole
Cell wall, nucleus, Golgi body, mitochondria, chloroplast, vacuole
Of the following, which option correctly lists the organelles/structures that a plant cell contains that an animal cell does not?
Cell membrane, large vacuole, chloroplasts
Cell wall, chloroplasts, lysosomes
Cell wall, large vacuole, chloroplasts, lysosomes
Cell wall, large vacuole, chloroplasts
Which of the following is an incorrect statement about cytoplasm?
The nucleus is part of the cytoplasm.
The cytoplasm is that part of the protoplasm that is outside the nucleus.
The cytoplasm consists of a liquid called the cytosol.
The cytoplasm contains dissolved chemical substances.
Which of the following options identifies in the correct order the function of mitochondria, chloroplasts and ribosomes?
Photosynthesis; cellular respiration; produce polypeptides
Produce polypeptides; photosynthesis; cellular respiration
Cellular respiration; photosynthesis; produce polypeptides
Cellular respiration; produce polypeptides; photosynthesis
A teacher described the structure and function of an organelle as follows:
This organelle is small and formed by the Golgi apparatus. It contains digestive enzymes that are responsible for splitting complex chemical compounds into simpler ones, such as when proteins are broken down into amino acids. Sometimes these organelles may destroy old or damaged cells.
Identify the type of organelle described by the teacher.
Golgi body
Lysosome
Vacuole
Centriole
Which of the following statements about the nucleus is incorrect?
The nucleus is surrounded by a double nuclear membrane that contains many pores.
The nucleus stores the information needed to control all cell activities.
The nucleus is responsible for the processing, sorting and packaging of cell products.
The nucleus contains the nucleolus which is responsible for producing ribosomes.
Organelles such as the endoplasmic reticulum, mitochondria, Golgi body, chloroplasts are similar in that their structure is made up of flat membranes containing many folds.
The main reason that they all contain these flat, folded structures is that:
this provides the organelles with a distinctive pattern for identification.
this increases the surface area available for the organelle to carry out its function.
all of these organelles carry out the same function.
it allows the substances within the organelle to move more freely.
The structure of the cell membrane:
can be seen using an electron microscope.
is based on the fluid mosaic model.
allows any substance to move into and out of the cell.
allows the concentration of substances inside the cell to vary.
Which of the following statements is incorrect based on the fluid mosaic model of membrane structure?
The cell membrane is made up of a ‘lipid sea’ with many and various proteins floating on and in it.
The cell membrane is made up of a double layer of lipids with the ability to flow and change shape.
Specialised protein molecules are embedded in the lipid in various patterns like a mosaic.
Only the proteins control the exchange of materials between the external and internal environments.
The phospholipid bilayer shown in the diagram below is made up of:
a head made up of fatty acids that are ‘water hating’ and a tail that is containing phosphate that is ‘water loving’.
a head containing phosphate that is ‘water hating’ and a tail that is made up of fatty acids that are ‘water loving’.
a head containing phosphate that is ‘water loving’ and a tail that is made up of fatty acids that are ‘water hating’.
a head made up of fatty acids that are ‘water loving’ and a tail that is containing phosphate that is ‘water hating’.
Of the following, which is NOT a function of the lipid components of the membrane?
To allow the membrane to produce energy
To allow the membrane to be flexible and repair itself
To allow the cells to change shape and grow
To allow the membrane to break and repair itself during cell division
Models are used in science for a number of reasons. Which of the following is an incorrect statement about the use of models?
They can simplify a concept.
They need to be validated in order to be accepted.
They can be used to make a simulated representation of something that can’t be seen.
They can’t be used to make a prediction of expected results.
Which of the following types of substances would move the most freely through the cell membrane?
Large molecules
Non-lipid-soluble molecules
Lipid-soluble molecules
Electrically charged molecules
Which of the following statements most accurately defines the process of diffusion?
The net movement of the molecules of a substance from a region of low concentration to a region of high concentration until equilibrium is reached
The net movement of water from a region of high solute concentration to a region of low solute concentration through a differentially permeable membrane
The net movement of water from a region of high water concentration to a region of low water concentration through a differentially permeable membrane
The net movement of the molecules of a substance from a region of high concentration to a region of low concentration until equilibrium is reached
Which of the following options identifies what the different parts of the model shown below (dialysis tubing, starch solution, iodide solution) represent in the actual process of diffusion?
Cell wall; external solution surrounding the cell; large molecule that has difficulty diffusing through membrane
Cell membrane; internal contents of cell; small molecule that easily diffuses through membrane
Cell wall; internal contents of cell; small molecule that easily diffuses through membrane
Cell membrane; external solution surrounding the cell; large molecule that has difficulty diffusing through membrane
Which one of the following processes facilitates the movement of large molecules and charged particles either into or out of the cell through the phospholipid bilayer? This movement would occur with the concentration gradient.
Diffusion
Osmosis
Active transport
Facilitated diffusion
Which of the following best describes the process of osmosis?
The movement of water through a semipermeable membrane from a region of high water concentration (low solute concentration) to a region of low water concentration (high solute concentration)
The movement of water through a semipermeable membrane from a region of low water concentration (low solute concentration) to a region of high water concentration (high solute concentration)
The movement of water through a semipermeable membrane from a region of low water concentration (high solute concentration) to a region of high water concentration (low solute concentration)
The movement of water through a semipermeable membrane from a region of high water concentration (high solute concentration) to a region of low water concentration (low solute concentration)
An animal cell is placed into a solution that has a higher solute concentration than its cytoplasm. The solution surrounding this cell is known as:
hypertonic to the cells
hypotonic to the cells
osmotic to the cells
isotonic to the cells
An animal cell is placed into a solution that has a higher solute concentration than its cytoplasm. In which direction would the net water movement occur?
There would be no water movement
The water would move in both directions equally
Out of the animal cell
Into the animal cell
In the kidney, cells have to reabsorb glucose into their cells against the concentration gradient. Which of the following processes facilitates this movement?
Diffusion
Active transport
Facilitated diffusion
Osmosis
When an amoeba surrounds its prey (Tetrahymena) the membrane transport process used is:
pinocytosis
phagocytosis
exocytosis
active transport
As the size of a cell increases
the volume and surface area decrease at the same rate.
the volume and surface area decrease at the same rate.
the surface-area-to-volume ratio decreases.
the surface-area-to-volume ratio increases.
The main advantage of a small cell size is that:
it has a large volume relative to its surface area, increasing its efficiency in obtaining nutrients and removing wastes.
it weighs very little and is more able to conserve energy than a large cell.
it takes up much less space in the organism.
it has a small volume relative to its surface area, increasing its efficiency in obtaining nutrients and removing wastes.
The SA:V ratio of the shape below is:
12:1
7:1
8:1
6:1
Glucose is classed as which type of biomacromolecule?
Carbohydrate
Protein
Lipid
Nucleic acid
Lipids are typically made up of:
amino acid chains.
glycerol molecules.
triglyceride molecules.
fatty acid chains.
The primary function of an enzyme in a reaction is to:
decrease the activation energy.
increase the activation energy.
act as substrate molecules.
keep the products from interacting.
In an enzyme-catalysed reaction, as the temperature increases, the rate of the reaction:
will not change at all.
will increase to a certain point and then level off.
will decrease to a certain point and then level off.
will increase to a certain point and then decrease rapidly.
Which of the following are the products of photosynthesis?
Water, sugar and carbon dioxide
Glucose and oxygen
Water and carbon dioxide
Water, oxygen and glucose
Which of the following options contains the correct answers to fill in the gaps in the sentence below regarding the process of photosynthesis?
In photosynthesis, the light-dependent reactions occur in the (i)_______________, while the light-independent stage occurs in the (ii)__________________.
(i) Stroma, (ii) thylakoid membranes
(i) Thylakoid membranes, (ii) stroma
(i) Cytoplasm, (ii) stroma
(i) Stroma, (ii) cytoplasm
Which of the following is a correct statement about the process of aerobic cellular respiration?
Aerobic cellular respiration is a process in plants that produces energy.
Aerobic cellular respiration is a process in animals that involves breathing.
Aerobic cellular respiration is a process in both plants and animals that produces energy.
Aerobic cellular respiration is a process in animals that produces energy.
In animals, which of the following substances is produced anaerobically during strenuous exercise?
Lactic acid
Glucose
Ethanol
Carbon dioxide
Which of the following types of substances would move the most freely through the cell membrane?
Large molecules
Non-lipid-soluble molecules
Lipid-soluble molecules
Electrically charged molecules
Which of the following statements most accurately defines the process of diffusion?
The net movement of the molecules of a substance from a region of low concentration to a region of high concentration until equilibrium is reached
The net movement of water from a region of high solute concentration to a region of low solute concentration through a differentially permeable membrane
The net movement of water from a region of high water concentration to a region of low water concentration through a differentially permeable membrane
The net movement of the molecules of a substance from a region of high concentration to a region of low concentration until equilibrium is reached
Which of the following options identifies what the different parts of the model shown below (dialysis tubing, starch solution, iodide solution) represent in the actual process of diffusion?
Cell wall; external solution surrounding the cell; large molecule that has difficulty diffusing through membrane
Cell membrane; internal contents of cell; small molecule that easily diffuses through membrane
Cell wall; internal contents of cell; small molecule that easily diffuses through membrane
Cell membrane; external solution surrounding the cell; large molecule that has difficulty diffusing through membrane
Which one of the following processes facilitates the movement of large molecules and charged particles either into or out of the cell through the phospholipid bilayer? This movement would occur with the concentration gradient.
Diffusion
Osmosis
Active transport
Facilitated diffusion
Which of the following best describes the process of osmosis?
The movement of water through a semipermeable membrane from a region of high water concentration (low solute concentration) to a region of low water concentration (high solute concentration)
The movement of water through a semipermeable membrane from a region of low water concentration (low solute concentration) to a region of high water concentration (high solute concentration)
The movement of water through a semipermeable membrane from a region of low water concentration (high solute concentration) to a region of high water concentration (low solute concentration)
The movement of water through a semipermeable membrane from a region of high water concentration (high solute concentration) to a region of low water concentration (low solute concentration)
An animal cell is placed into a solution that has a higher solute concentration than its cytoplasm. The solution surrounding this cell is known as:
hypertonic to the cells
hypotonic to the cells
osmotic to the cells
isotonic to the cells
An animal cell is placed into a solution that has a higher solute concentration than its cytoplasm. In which direction would the net water movement occur?
There would be no water movement
The water would move in both directions equally
Out of the animal cell
Into the animal cell
In the kidney, cells have to reabsorb glucose into their cells against the concentration gradient. Which of the following processes facilitates this movement?
Diffusion
Active transport
Facilitated diffusion
Osmosis
When an amoeba surrounds its prey (Tetrahymena) the membrane transport process used is:
pinocytosis
phagocytosis
exocytosis
active transport
As the size of a cell increases
the volume and surface area decrease at the same rate.
the volume and surface area decrease at the same rate.
the surface-area-to-volume ratio decreases.
the surface-area-to-volume ratio increases.
The main advantage of a small cell size is that:
it has a large volume relative to its surface area, increasing its efficiency in obtaining nutrients and removing wastes.
it weighs very little and is more able to conserve energy than a large cell.
it takes up much less space in the organism.
it has a small volume relative to its surface area, increasing its efficiency in obtaining nutrients and removing wastes.
The SA:V ratio of the shape below is:
12:1
7:1
8:1
6:1
Glucose is classed as which type of biomacromolecule?
Carbohydrate
Protein
Lipid
Nucleic acid
Lipids are typically made up of:
amino acid chains.
glycerol molecules.
triglyceride molecules.
fatty acid chains.
The primary function of an enzyme in a reaction is to:
decrease the activation energy.
increase the activation energy.
act as substrate molecules.
keep the products from interacting.
In an enzyme-catalysed reaction, as the temperature increases, the rate of the reaction:
will not change at all.
will increase to a certain point and then level off.
will decrease to a certain point and then level off.
will increase to a certain point and then decrease rapidly.
Which of the following are the products of photosynthesis?
Water, sugar and carbon dioxide
Glucose and oxygen
Water and carbon dioxide
Water, oxygen and glucose
Which of the following options contains the correct answers to fill in the gaps in the sentence below regarding the process of photosynthesis?
In photosynthesis, the light-dependent reactions occur in the (i)_______________, while the light-independent stage occurs in the (ii)__________________.
(i) Stroma, (ii) thylakoid membranes
(i) Thylakoid membranes, (ii) stroma
(i) Cytoplasm, (ii) stroma
(i) Stroma, (ii) cytoplasm
Which of the following is a correct statement about the process of aerobic cellular respiration?
Aerobic cellular respiration is a process in plants that produces energy.
Aerobic cellular respiration is a process in animals that involves breathing.
Aerobic cellular respiration is a process in both plants and animals that produces energy.
Aerobic cellular respiration is a process in animals that produces energy.
In animals, which of the following substances is produced anaerobically during strenuous exercise?
Lactic acid
Glucose
Ethanol
Carbon dioxide
The main difference between autotrophs and heterotrophs in terms of obtaining their nutrient requirements is that:
autotrophs must take in all required organic and inorganic nutrients; heterotrophs possess the ability to produce their own organic nutrients but need to take in the required organic nutrients.
There is no difference in terms of autotrophs and heterotrophs obtaining their nutrient requirements.
heterotrophs must take in all required organic and inorganic nutrients; autotrophs possess the ability to produce their own organic nutrients but need to take in the required organic nutrients.
heterotrophs must take in all required organic but can produce some of their inorganic nutrients; autotrophs possess the ability to produce their own organic nutrients but need to take in the required organic nutrients.
The systems in a vascular plant are:
root, shoot and vascular.
root, shoot and xylem
root, leaves and vascular.
root, stem and vascular.
Which of the following statements about the root system is INCORRECT?
Water moves from the soil into the roots by diffusion/osmosis
Root cells contain chloroplasts.
The main function of the roots is to anchor the plant in the soil and absorb water and mineral ions
Branching root systems and root hair cells increase the surface area for absorption.
Which of the following statements about vascular tissue is correct?
Xylem carries the products of photosynthesis to all parts of the plant.
Xylem carries the water and minerals that have been absorbed in the roots.
Phloem carries minerals from the leaves to the rest of the plant.
Movement of substances in phloem occurs in only one direction.
What is the main function of the leaf?
To absorb sunlight and carry out photosynthesis
To provide shade for the plant
To provide food for animals
To carry out respiration
In a plant, the dermal tissue in the stem is:
all of the internal tissue in the stem.
the packing tissue of the stem.
the tissue that makes up the xylem and phloem.
the outer layer of the stem.
The leaves of plants are adapted to absorb the maximum amount of sunlight possible.
Which of the following options is NOT an adaptation of the leaf to absorb the maximum amount of sunlight?
Thin, flat structure
Palisade mesophyll cells packed with chloroplasts
Cuticle covering the upper and lower surface of the leaf
Vertical, elongated palisade cells
Advanced imaging technologies can be used to determine plant structure and function.
Which of the following is NOT an example of an advanced imaging technology?
Positron emission tomography
X-ray computed microtomography
Magnetic resonance imaging
Digital camera
Different technologies such as radioactive tracing using radioisotopes can trace the development and movement of the products of photosynthesis.
Using these technologies, it was found that the source of the oxygen gas released in the process of photosynthesis was:
the water.
the carbon dioxide gas.
the glucose.
both the water and carbon dioxide gas.
In an experiment, two leaves were taken from the same plant and examined under a light microscope. In leaf 1 most of the stomata were closed; in leaf 2, most of the stomata were open.
What is the most likely explanation for this difference?
Leaf 1 was removed when the plant was still growing; leaf 2 was removed when the plant was mature.
Leaf 1 was removed when the plant was water stressed; leaf 2 was removed when the plant was not water stressed.
Leaf 1 was removed on a cold day; leaf 2 was removed on a very hot day.
Leaf 1 was removed during the day; leaf 2 was removed at night.
Cellular respiration in plants occurs:
during the day only.
during the night only.
during the day and night.
only when the stomata are open
The alveoli situated within the lungs is the gaseous exchange surface in mammals.
Which of the following is NOT a characteristic that would ensure efficient gas exchange?
The large number of small alveoli provides a large surface area.
Each alveolus has a single layer of flattened cells.
The surface of all parts of the respiratory system is moist.
A small number of capillaries surround each alveolus.
A terrestrial animal has a respiratory system that has openings, called spiracles, that contain valves to regulate their opening and closing. Air enters the spiracle and moves into tracheal tubes which branch into tracheoles that bring the air directly to the cells.
Which of the following correctly identifies the terrestrial animal that possesses this system for gaseous exchange?
Fish
Birds
Insects
Reptiles
Use the following information to answer Questions 14–17.
Snails and a water plant are being used in this experiment to compare gas exchange in plants and animals.
The liquid in the test tubes shown in the diagram is the indicator hydrogen carbonate solution.
This indicator changes colour due the amount of carbon dioxide present.
It is red when the level of carbon dioxide is equal to that in the atmosphere, orange/yellow when carbon dioxide levels increase (low pH) and changes from red to magenta to purple with decreased carbon dioxide levels (high pH).
Which test tubes are being used as controls in this experiment?
1 and 2
4 and 8
2 and 6
3 and 7
In which test tube would photosynthesis be occurring?
2 and 6
3 and 7
2, 3, 6 and 7
2 and 3
Which option correctly identifies all of the test tubes where cellular respiration are occurring?
1, 3, 5 and 7
1, 2, 3, 5, 6 and 7
2, 3, 6 and 7
1, 2 and 3
Which of the test tubes would be expected to have the lowest pH at the Conclusion of the experiment?
7
3
2
1
We chew food in order to break it into smaller pieces in order to increase its surface area.
This is an example of:
Chemical Digestion
Initial Digestion
Physical Digestion
Mechanical Digestion
Which of the following organs in the digestive system are lined with villi?
Oesophagus
Stomach
Small Intestine
Large Intestine
Enzymes are secreted by many organs in the digestive system.
Which of the following does not secrete digestive enzymes?
Oesophagus
Stomach
Salivary Glands
Pancreas
The main difference between autotrophs and heterotrophs in terms of obtaining their nutrient requirements is that:
autotrophs must take in all required organic and inorganic nutrients; heterotrophs possess the ability to produce their own organic nutrients but need to take in the required organic nutrients.
There is no difference in terms of autotrophs and heterotrophs obtaining their nutrient requirements.
heterotrophs must take in all required organic and inorganic nutrients; autotrophs possess the ability to produce their own organic nutrients but need to take in the required organic nutrients.
heterotrophs must take in all required organic but can produce some of their inorganic nutrients; autotrophs possess the ability to produce their own organic nutrients but need to take in the required organic nutrients.
The systems in a vascular plant are:
root, shoot and vascular.
root, shoot and xylem.
root, leaves and vascular.
root, stem and vascular.
Which of the following statements about the root system is INCORRECT?
Water moves from the soil into the roots by diffusion.
Root cells contain chloroplasts.
The main function of the roots is to anchor the plant in the soil and absorb water and mineral ions.
Branching root systems and root hair cells increase the surface area for absorption.
Which of the following statements about vascular tissue is correct?
Xylem carries the products of photosynthesis to all parts of the plant.
Xylem carries the water and minerals that have been absorbed in the roots.
Phloem carries minerals from the leaves to the rest of the plant.
Movement of substances in phloem occurs in only one direction.
What is the main function of the leaf?
To absorb sunlight and carry out photosynthesis
To provide shade for the plant
To provide food for animals
To carry out respiration
In a plant, the dermal tissue in the stem is:
all of the internal tissue in the stem.
the packing tissue of the stem.
the tissue that makes up the xylem and phloem.
the outer layer of the stem.
The leaves of plants are adapted to absorb the maximum amount of sunlight possible.
Which of the following options is NOT an adaptation of the leaf to absorb the maximum amount of sunlight?
Thin, flat structure
Palisade mesophyll cells packed with chloroplasts
Cuticle covering the upper and lower surface of the leaf
Vertical, elongated palisade cells
Advanced imaging technologies can be used to determine plant structure and function.
Which of the following is NOT an example of an advanced imaging technology?
Positron emission tomography
X-ray computed microtomography
Magnetic resonance imaging
Digital camera
Different technologies such as radioactive tracing using radioisotopes can trace the development and movement of the products of photosynthesis.
Using these technologies, it was found that the source of the oxygen gas released in the process of photosynthesis was:
the water.
the carbon dioxide gas.
the glucose.
both the water and carbon dioxide gas.
In an experiment, two leaves were taken from the same plant and examined under a light microscope. In leaf 1 most of the stomata were closed; in leaf 2, most of the stomata were open.
What is the most likely explanation for this difference?
Leaf 1 was removed when the plant was still growing; leaf 2 was removed when the plant was mature.
Leaf 1 was removed when the plant was water stressed; leaf 2 was removed when the plant was not water stressed.
Leaf 1 was removed on a cold day; leaf 2 was removed on a very hot day.
Leaf 1 was removed during the day; leaf 2 was removed at night.
Cellular respiration in plants occurs:
during the day only.
during the night only.
during the day and night.
only when the stomata are open.
The alveoli situated within the lungs is the gaseous exchange surface in mammals.
Which of the following is NOT a characteristic that would ensure efficient gas exchange?
The large number of small alveoli provides a large surface area.
Each alveolus has a single layer of flattened cells.
The surface of all parts of the respiratory system is moist.
A small number of capillaries surround each alveolus.
A terrestrial animal has a respiratory system that has openings, called spiracles, that contain valves to regulate their opening and closing. Air enters the spiracle and moves into tracheal tubes which branch into tracheoles that bring the air directly to the cells.
Which of the following correctly identifies the terrestrial animal that possesses this system for gaseous exchange?
Fish
Birds
Insects
Reptiles
Use the following picture to answer:
Snails and a water plant are being used in this experiment to compare gas exchange in plants and animals.
The liquid in the test tubes shown in the diagram is the indicator hydrogen carbonate solution.
This indicator changes colour due the amount of carbon dioxide present.
It is red when the level of carbon dioxide is equal to that in the atmosphere, orange/yellow when carbon dioxide levels increase (low pH) and changes from red to magenta to purple with decreased carbon dioxide levels (high pH).
Which test tubes are being used as controls in this experiment?
1 and 2
4 and 8
2 and 6
3 and 7
Use the following picture to answer:
Snails and a water plant are being used in this experiment to compare gas exchange in plants and animals.
The liquid in the test tubes shown in the diagram is the indicator hydrogen carbonate solution.
This indicator changes colour due the amount of carbon dioxide present.
It is red when the level of carbon dioxide is equal to that in the atmosphere, orange/yellow when carbon dioxide levels increase (low pH) and changes from red to magenta to purple with decreased carbon dioxide levels (high pH).
In which test tubes would photosynthesis be occurring?
2 and 6
3 and 7
2, 3, 6 and 7
2 and 3
Use the following picture to answer:
Snails and a water plant are being used in this experiment to compare gas exchange in plants and animals.
The liquid in the test tubes shown in the diagram is the indicator hydrogen carbonate solution.
This indicator changes colour due the amount of carbon dioxide present.
It is red when the level of carbon dioxide is equal to that in the atmosphere, orange/yellow when carbon dioxide levels increase (low pH) and changes from red to magenta to purple with decreased carbon dioxide levels (high pH).
Which option correctly identifies all of the test tubes in which cellular respiration would be occurring?
1, 3, 5, 7
1, 2, 3, 5, 6, 7
2, 3, 6, 7
1, 2, 3
Use the following picture to answer:
Snails and a water plant are being used in this experiment to compare gas exchange in plants and animals.
The liquid in the test tubes shown in the diagram is the indicator hydrogen carbonate solution.
This indicator changes colour due the amount of carbon dioxide present.
It is red when the level of carbon dioxide is equal to that in the atmosphere, orange/yellow when carbon dioxide levels increase (low pH) and changes from red to magenta to purple with decreased carbon dioxide levels (high pH).
Which of the test tubes would be expected to have the lowest pH at the conclusion of the experiment?
7
3
2
1
We chew food in order to break it down from large pieces into small pieces to increase its surface area.
This is an example of:
chemical digestion.
initial digestion.
physical digestion.
mechanical digestion.
Which of the following organs in the digestive system are lined with villi?
Oesophagus
Stomach
Small intestine
Large intestine
Enzymes are secreted by many organs in the digestive system.
Which of the following does not secrete digestive enzymes?
Oesophagus
Stomach
Salivary glands
Pancreas
Which of the following is NOT a characteristic of transport systems in plants and animals?
A system of vessels in which substances are transported
A heart to pump the fluid
A suitable transport medium
A driving mechanism to move the substances
The main driving force for the movement of water from the roots to the top of the plant is:
the negative gravitational pull from Earth.
the atmospheric pressure on roots.
osmosis in the roots.
the tension caused by the evaporation of water through the stomata.
Which of the following is NOT a requirement for a successful transpiration stream?
Adhesion of water cells to the xylem walls
Cohesive forces between water molecules
Active transport of water through xylem vessels
Thick, lignified walls of the xylem tissue to withstand the pressure
Eosin was used in this experiment:
to dye the water to trace its pathway through the plant.
to create a pattern in the celery.
to demonstrate the movement of sugars through the plant.
to demonstrate that eosin is capable of moving through the plant.
The attraction of water molecules to each other is called:
adhesion
cohesion
attraction
transpirational pull.
The term given to (i) the movement of the products of photosynthesis throughout the plant and (ii) the direction of movement is:
(i) translocation and (ii) only one direction
(i) transpiration and (ii) only one direction
(i) transpiration and (ii) whichever direction is required
(i) translocation and (ii) whichever direction is required
Which of the following types of tissue are represented by the diagram below?
Xylem
Xylem and phloem
Vascular bundle
Phloem
The movement of substances in the phloem is caused by:
the formation of high pressure areas at the sink and low pressure areas at the source.
the movement of water in the xylem.
the formation of high pressure areas at the source and low pressure areas at the sink.
the formation of equal areas of pressure at both the source and the sink.
Which of the following best describes how a region of high pressure is formed in the phloem tissue?
Water is actively pumped into the phloem tissue, which creates a dilute solution, which in turn causes sugars to move by diffusion into the phloem.
Sugars are actively pumped into the phloem tissue, which creates a concentrated solution, which in turn causes water to move by osmosis into the phloem.
Sugars move by diffusion into the phloem tissue, which creates a concentrated solution, which in turn causes water to be actively pumped into the phloem.
Water moves by osmosis into the phloem tissue, which creates a dilute solution, which in turn causes sugars to be actively pumped into the phloem.
In an apple tree, it is expected that the sugars produced by the tree would flow from (i)____________ to (ii)__________________.
Choose the option that would correctly fill in the terms in the sentence above.
(i) a leaf (ii) a growing apple
(i) the trunk (ii) a leaf
(i) the roots (ii) a growing shoot
(i) a growing shoot (ii) a leaf
A tree had a ring of bark removed. The tree looked normal for a number of weeks before it died.
The tissue that remained functional in the weeks before the tree died is:
the phloem
the xylem
the sieve elements
the companion cells
Which of the following statements is INCORRECT?
Our scientific understanding of the structure and functioning of plants has been developed by many scientists.
Hypotheses, theories and models are modified when required if new information and results indicate they are no longer correct.
Many theories about the functioning of plants over the years have been proven correct.
Successful collaboration of scientists is advantage to the understanding of scientific concepts.
Invertebrate animals possess an open circulatory system.
An open circulatory system does NOT:
transport gases through the body of the organism.
possess a heart.
possess open-ended blood vessels
surround the organs with blood.
Which of the following is the correct pathway of blood through the circulatory system?
Left atrium ? left ventricle ? lungs ? right atrium ? right ventricle ? body
Left atrium ? lungs ? left ventricle ? body ? right atrium ? right ventricle
Left atrium ? left ventricle ? right atrium ? right ventricle ? lungs ? body
Left atrium ? left ventricle ? body ? right atrium ? right ventricle ? lungs
Which of the chambers of the heart is the most muscular and why?
The right ventricle as it has to pump the blood to all parts of the body.
The right ventricle as it has to pump the blood to the lungs.
The left ventricle as it has to pump the blood to all parts of the body.
The left ventricle as it has to pump the blood to the lungs.
The blood vessels that provide direct access to all body cells are the:
arteries and arterioles.
veins and venules.
capillaries.
arteries and veins.
The component that makes up the greatest percentage in human blood is:
red blood cells
plasma
white blood cells
red and white blood cells combined
One of the transport systems in mammals is the lymphatic system.
This system:
consists of veins with one-way valves in them.
is a series of vessels that collect the extra intracellular fluids and return them to the arteries.
is a series of vessels that collect the fluids from between the cells and return it to the bloodstream.
carries lymph around the body, from the heart and back again.
As blood circulates from the heart through the body, it changes colour.
Which of the following statements is correct?
Blood turns light red because the amount of oxygen it is carrying decreases.
Blood turns dark red because it is picking up oxygen.
Blood turns light red because it is picking up oxygen.
Blood turns dark red because the amount of oxygen in it decreases.
The composition of blood changes as it moves through the circulatory system. After blood has passed through a particular organ in mammalian body it was found to have less oxygen, more carbon dioxide, more glucose and more amino acids.
The organ that the blood has passed through is most likely:
the lungs.
the kidney.
the large intestine.
the small intestine.
