Font size
WorksheetsBasic Concepts in Biology and Chemistry
Total questions: 100
Worksheet time: 50mins
What is the primary function of covalent bonds?
Atoms share electrons to fill their outer electron shells, creating stability.
One atom donates electrons to another, forming ions.
They are found in fats, oils, and waxes.
They capture solar energy and convert it into chemical energy.
Which type of bond involves one atom donating electrons to another?
Covalent Bonds
Ionic Bonds
Hydrogen Bonds
Metallic Bonds
What are simple carbohydrates, such as glucose and fructose, primarily used for?
Long-term energy storage
Quick energy
Building cell membranes
Protein synthesis
Where are complex carbohydrates commonly found?
In oils and waxes
In proteins
In foods like potatoes, grains, and rice
In cell membranes
What is the role of lipids in the body?
They are critical for growth, repair, and body maintenance.
They store energy and form cell membranes.
They convert glucose into ATP.
They capture solar energy.
What are proteins essential for in the body?
Storing energy
Protecting cells
Growth, repair, and body maintenance
Capturing solar energy
What does metabolism refer to?
The process of photosynthesis
The replication and division of cells
All chemical reactions within a cell
The structure of phospholipids
What is the main purpose of cellular respiration?
To capture solar energy
To convert glucose into ATP
To replicate and divide cells
To form cell membranes
What process captures solar energy and converts it into chemical energy?
Cellular respiration
Photosynthesis
Metabolism
Cell division
What does cell division involve?
The conversion of glucose into ATP
The capture of solar energy
The replication and division of cells
The formation of phospholipid bilayers
How do phospholipids arrange themselves in a bilayer structure?
Heads point outward toward the water, tails point inward
Tails point outward toward the water, heads point inward
Heads and tails both point outward
Heads and tails both point inward
What is the function of the nucleus in a cell?
It produces energy through cellular respiration.
It stores the cell's genetic material and directs all activities.
It breaks down waste and damaged cell parts.
It captures sunlight and converts it into energy.
Which organelle is known as the "powerhouse" of the cell?
Ribosomes
Golgi Apparatus
Mitochondria
Lysosomes
What is the primary role of ribosomes in a cell?
To store water and nutrients
To build proteins based on instructions from the cell's DNA
To modify and package proteins and lipids
To capture sunlight for photosynthesis
What is the function of the endoplasmic reticulum (ER) in a cell?
It stores the cell's genetic material.
It is involved in the transport and detoxification of substances.
It captures sunlight and converts it into energy.
It provides structure and support to the cell.
Which organelle is referred to as the "packaging and shipping center" of the cell?
Lysosomes
Golgi Apparatus
Chloroplasts
Vacuoles
What is the main function of lysosomes in a cell?
To produce energy through cellular respiration
To break down waste and foreign invaders
To store water and nutrients
To provide structure and support
Which organelle is found only in plant cells and is responsible for photosynthesis?
Mitochondria
Chloroplasts
Ribosomes
Golgi Apparatus
What is the role of vacuoles in plant cells?
To produce proteins
To store water and nutrients
To capture sunlight
To detoxify substances
What is the function of the cytoskeleton in a cell?
To store genetic material
To provide structure and enable movement
To break down waste
To capture sunlight
What distinguishes prokaryotic cells from eukaryotic cells?
Prokaryotic cells have a nucleus.
Prokaryotic cells lack a membrane-enclosed nucleus.
Prokaryotic cells contain chloroplasts.
Prokaryotic cells have a Golgi apparatus.
What is the primary mechanism of homeostasis that counteracts initial fluctuations in a physiological variable?
Positive feedback
Negative feedback
Passive transport
Active transport
Which process involves the movement of substances across a cell membrane without the use of energy by the cell?
Active transport
Passive transport
Cellular respiration
Aerobic respiration
What is the energy-requiring process that moves material across a cell membrane against a concentration difference?
Passive transport
Active transport
Anaerobic respiration
Krebs cycle
Which process releases energy by breaking down glucose and other food molecules in the presence of oxygen?
Anaerobic respiration
Cellular respiration
Light-dependent reactions
Prophase
What are the reactions in photosynthesis that do not require light and use energy from ATP and NADPH to build high-energy compounds?
Light-dependent reactions
Light-independent reactions
Aerobic respiration
Krebs cycle
Which stage of cellular respiration involves the breakdown of pyruvic acid into carbon dioxide in a series of energy-extracting reactions?
Prophase
Krebs cycle
Anaerobic respiration
Light-dependent reactions
During which phase do chromosomes condense and become visible, and the nuclear membrane starts to dissolve?
Prophase
Metaphase
Anaphase
Telophase
What happens during the Metaphase of cell division?
Chromosomes reach opposite poles of the cell.
Chromosomes line up in the center of the cell.
DNA replication occurs.
The cell grows and prepares for DNA synthesis.
During which phase do spindle fibers pull sister chromatids apart?
Metaphase
Anaphase
Telophase
Interphase
What is the main event of the Telophase in cell division?
Chromosomes line up in the center of the cell.
DNA replication occurs.
Chromosomes reach opposite poles and new nuclear membranes form.
The cell grows and prepares for DNA synthesis.
What is the Interphase in the cell cycle?
The phase where chromosomes line up in the center of the cell.
The period of the cell cycle between cell divisions.
The phase where spindle fibers pull sister chromatids apart.
The phase where new nuclear membranes form.
What occurs during the G1 Phase of the cell cycle?
DNA replication
Chromosomes line up in the center of the cell
The first gap or growth phase before DNA synthesis
Chromosomes reach opposite poles of the cell
Which phase is responsible for DNA replication?
G1 Phase
S Phase
G2 Phase
Metaphase
What is the G2 Phase known for in the cell cycle?
DNA replication
The second growth phase after DNA synthesis
Chromosomes lining up in the center of the cell
Chromosomes reaching opposite poles of the cell
What is the purpose of Meiosis in organisms?
To produce identical cells
To produce reproductive cells in sexually reproducing organisms
To replicate DNA
To line up chromosomes in the center of the cell
What are Protists?
Single-celled prokaryotes with cell walls containing peptidoglycan
Unicellular organisms in the Protista kingdom
Single-celled prokaryotes that thrive in extreme environments
Nonvascular plants that reproduce using spores
What is a characteristic of bacteria?
Thrive in extreme environments
Have cell walls containing peptidoglycan
Include mosses and liverworts
Reproduce using spores
What defines archaea?
Unicellular organisms in the Protista kingdom
Single-celled prokaryotes that thrive in extreme environments
Nonvascular plants that reproduce using spores
Vascular plants that include ferns and horsetails
What are bryophytes?
Vascular plants that include ferns and horsetails
Nonvascular plants that include mosses, liverworts, and hornworts
Single-celled prokaryotes with cell walls containing peptidoglycan
Unicellular organisms in the Protista kingdom
What are seedless vascular plants (Pteridophytes)?
Nonvascular plants that include mosses and liverworts
Vascular plants that include ferns and horsetails
Single-celled prokaryotes that thrive in extreme environments
Unicellular organisms in the Protista kingdom
What are gymnosperms?
Flowering plants with seeds enclosed in fruit
Vascular plants with seeds in cones
Plants with seeds enclosed in flowers
Non-vascular plants with seeds in fruit
What is the function of a stoma plant?
Used for water absorption
Used for gas exchange
Used for nutrient storage
Used for seed dispersal
What are invertebrates?
Animals with backbones
Animals without backbones
Animals with exoskeletons
Animals with vertebrae
What is the Calvin cycle?
A set of reactions in photosynthesis that require light
Reactions of photosynthesis that build high-energy compounds
A process of breaking down sugars
A cycle that occurs in cellular respiration
What is codominance?
A condition where one allele is completely dominant
A condition where neither allele is dominant or recessive
A condition where alleles blend together
A condition where one allele is recessive
What is convergence in biology?
When two organisms evolve to look similar despite being distantly related
When two organisms evolve to look different despite being closely related
When two organisms share a common ancestor
When two organisms develop similar traits due to shared environment
What is a vestigial structure?
A structure that serves a new purpose in an organism
A structure that no longer serves its natural purpose
A structure that is essential for survival
A structure that is newly evolved
What is genetic drift?
A change in allele frequency due to natural selection
A change in allele frequency due to chance events
A change in allele frequency due to mutation
A change in allele frequency due to migration
What is the bottleneck effect?
An increase in population size
A change in allele frequency following a population increase
A change in allele frequency following a dramatic reduction in population size
A change in allele frequency due to genetic mutation
What is allopatric speciation?
Formation of new species in the same geographic area
Formation of new species in geographically isolated populations
Formation of new species due to genetic mutation
Formation of new species due to environmental changes
What is temporal speciation?
When species reproduce at the same time
When species reproduce at different times
When species reproduce in different locations
When species reproduce due to environmental changes
What is the founder effect?
Change in allele frequencies due to a large population migration
Change in allele frequencies due to a small subgroup migration
Change in allele frequencies due to genetic mutation
Change in allele frequencies due to environmental changes
What is phyletic gradualism?
Evolution by rapid changes over a short time
Evolution by accumulation of many small changes over a long time
Evolution by a single large change
Evolution by environmental adaptation
What is punctuated equilibrium?
Evolution with constant gradual changes
Evolution with long stable periods interrupted by rapid changes
Evolution with no changes
Evolution with only rapid changes
What type of selection favors the average version of a trait?
Disruptive selection
Stabilizing selection
Balancing selection
Directional selection
Which type of selection favors individuals at both extremes of the phenotypic range?
Stabilizing selection
Balancing selection
Disruptive selection
Directional selection
What is the role of xylem in plants?
Carries nutrients from leaves to roots
Transports water upward from roots
Stores food in the form of starch
Protects the plant from pathogens
What is chitin primarily composed of?
Fatty acids
Amino sugar monomers
Nucleic acids
Proteins
What is the function of the pistil in a flower?
Male reproductive part
Photosynthesis
Female reproductive part
Attracts pollinators
What is allelopathy in plants?
The process of photosynthesis in plants
The chemical interactions between plants where one plant releases biochemicals affecting another
The growth of plants in aquatic environments
The genetic modification of plants
Which kingdom do unicellular prokaryotes with cell walls made of peptidoglycan belong to?
Protists
Eubacteria
Archaebacteria
Fungi
What is the main characteristic of archaebacteria?
They have cell walls made of cellulose
They have cell walls that do not contain peptidoglycan
They are multicellular organisms
They perform photosynthesis
Which of the following is a eukaryotic organism that cannot be classified as an animal, plant, or fungus?
Bacteria
Protists
Archaebacteria
Viruses
What is the function of macrophages in the lymph nodes?
They produce antibodies
They destroy bacteria, cancer cells, and other foreign matter
They transport oxygen
They store nutrients
What is the role of lysosomes in a cell?
They produce energy
They contain digestive enzymes
They synthesize proteins
They store genetic information
What is the function of Golgi bodies in a cell?
They produce energy
They package and transport cellular materials
They synthesize proteins
They store genetic information
Which of the following is the correct order of the Animal Classification System?
Kingdom, Phylum, Class, Order, Family, Genus, Species, Domain
Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species
Phylum, Class, Order, Family, Genus, Species, Domain, Kingdom
Class, Order, Family, Genus, Species, Domain, Kingdom, Phylum
What is a K-strategy species?
A species that produces many offspring with little parental care
A species that produces few offspring with a good chance of survival
A species that migrates seasonally
A species that is primarily aquatic
What characterizes an r-strategy reproductive strategy?
Slow reproduction with high parental care
Rapid reproduction of many small offspring with little or no parental care
Migration to different habitats
High survival rate of offspring
What are supporting ecosystem services?
Services that provide direct food resources
Services necessary for the production of all other ecosystem services
Services that regulate climate
Services that provide recreational opportunities
What is the function of living vascular tissue in plants?
It anchors the plant to the ground.
It carries sugar and organic substances throughout the plant.
It absorbs water and nutrients.
It supports the leaves.
What is the main function of roots in plants?
Photosynthesis
Gas exchange
Anchor and absorb water
Transport sugar
Which part of the plant supports the leaves?
Roots
Stem
Leaves
Stomata
What are the main ingredients for photosynthesis?
Oxygen, nitrogen, sunlight
Water, carbon dioxide, sunlight
Sugar, water, oxygen
Carbon dioxide, sugar, water
Which part of the plant is used for gas exchange?
Roots
Stem
Stomata
Chloroplast
Where in the cell does photosynthesis take place?
Nucleus
Mitochondria
Chloroplast
Ribosome
Why might plants have bigger leaves?
To reduce water loss
To maximize surface area for sunlight absorption
To protect from herbivores
To store more nutrients
What is radial symmetry?
Symmetry about a central axis
Symmetry along one plane
Asymmetrical shape
Symmetry in multiple planes
What are structural adaptations?
Behavioral changes in animals
Physical features that help animals meet survival needs
Genetic mutations in plants
Seasonal changes in animals
What is an example of a behavioral adaptation in animals?
Photosynthesis
Migration
Fragmentation
Spore formation
Which of the following is a physiological adaptation?
Hibernation
Camels storing water
Binary fission
Budding
What is a disadvantage of asexual reproduction?
Faster reproduction time
Lack of genetic diversity
Increased energy use
Formation of hybrids
What is binary fission?
Division of a single organism into two identical organisms
Formation of spores
Growth of a new organism from a fragment
Controlled mating for desired traits
What is budding in terms of reproduction?
Division into two identical organisms
Growth of a new cell from the body of a parent
Formation of spores
Mating of two distinct species
What is fragmentation in reproduction?
Division into two identical organisms
Growth of a new organism from a fragment
Formation of spores
Controlled mating for desired traits
What is spore formation?
Division into two identical organisms
Growth of a new cell from the body of a parent
Specialized cells develop into new organisms
Mating of two distinct species
What is vegetative propagation?
Division into two identical organisms
Growth of a new cell from the body of a parent
Plants producing new individuals from stems, roots, or leaves
Controlled mating for desired traits
What does a hybrid reproductive strategy involve?
Division into two identical organisms
Formation of offspring from two distinct species
Growth of a new organism from a fragment
Controlled mating for desired traits
What is a controlled reproductive strategy?
Division into two identical organisms
Growth of a new cell from the body of a parent
Controlled mating based on desired traits
Formation of offspring from two distinct species
What is commensalism?
A relationship where both organisms benefit
A relationship where one organism benefits and the other is unaffected
A relationship where one organism is harmed
A relationship where both organisms are harmed
What is adaptive radiation?
The process by which unrelated organisms evolve similarities
An evolutionary pattern where many species evolve from a single ancestral species
The process by which two species evolve in response to changes in each other
A condition where allele frequencies remain constant over time
What is convergent evolution?
The process by which unrelated organisms independently evolve similarities
The process by which many species evolve from a single ancestor
The process by which two species evolve in response to changes in each other
A condition where allele frequencies remain constant over time
What are homologous structures?
Structures in different species that are similar because of common ancestry
Body parts that share a common function, but not structure
Structures that are identical in all species
Structures that have no function
What are analogous structures?
Structures in different species that are similar because of common ancestry
Body parts that share a common function, but not structure
Structures that are identical in all species
Structures that have no function
What is coevolution?
The process by which unrelated organisms evolve similarities
An evolutionary pattern where many species evolve from a single ancestor
The process by which two species evolve in response to changes in each other
A condition where allele frequencies remain constant over time
What is selective pressure?
A condition where allele frequencies remain constant over time
When the environment pushes an individual or population to adapt or evolve
The process by which unrelated organisms evolve similarities
An evolutionary pattern where many species evolve from a single ancestor
What is the Hardy-Weinberg equilibrium?
A condition where allele frequencies remain constant over time
The process by which unrelated organisms evolve similarities
An evolutionary pattern where many species evolve from a single ancestor
The process by which two species evolve in response to changes in each other
What are auxins?
Plant hormones that lead to phototropism by elongating the dark side of the plant
A condition where allele frequencies remain constant over time
The process by which unrelated organisms evolve similarities
An evolutionary pattern where many species evolve from a single ancestor
What is a hypotonic solution?
A solution where the concentration of solutes is greater than that of the cell
A solution where the concentration of solutes is less than that of the cell
A solution where the concentration of solutes is equal to that of the cell
A solution where there are no solutes
