WorksheetsY9 LC1 Biology assessment
Total questions: 61
Worksheet time: 15hrs 15mins
What is the role of the nucleus?
Stores genetic information and controls the cell activities
Controls what enters and leaves the cell
A jelly-like substance where chemical reactions occur
Releases energy for the cell through aerobic respiration
Site of protein synthesis
What is the role of the cytoplasm?
Stores genetic information and controls the cell activities
Controls what enters and leaves the cell
A jelly-like substance where chemical reactions occur
Releases energy for the cell through aerobic respiration
Site of protein synthesis
What is the role of the cell membrane?
Stores genetic information and controls the cell activities
Controls what enters and leaves the cell
A jelly-like substance where chemical reactions occur
Releases energy for the cell through aerobic respiration
Site of protein synthesis
What is the role of the mitochondria?
Stores genetic information and controls the cell activities
Controls what enters and leaves the cell
A jelly-like substance where chemical reactions occur
Releases energy for the cell through aerobic respiration
Site of protein synthesis
What is the role of the ribosomes?
Stores genetic information and controls the cell activities
Controls what enters and leaves the cell
A jelly-like substance where chemical reactions occur
Releases energy for the cell through aerobic respiration
Site of protein synthesis
Which of the following are not present in animal cells. Select all that apply.
Cell membrane
Mitochondria
Cell wall
Chloroplasts
Permanent vacuole
Which of the following are not present in animal cells. Select all that apply.
Cell membrane
Mitochondria
Cell wall
Permanent vacuole
What is the name of the pigment that absorbs sunlight for photosynthesis?
Chloroplast
Chlorophyll
Cytoplasm
Cellulose
What is the name of the organelle that is the site of photosynthesis?
Chloroplast
Chlorophyll
Cytoplasm
Cellulose
What is the name of the protein that strengthens the cell wall?
Lignin
Chlorophyll
Ribosomes
Cellulose
Name the structure labelled 2.
Cell wall
Cell membrane
Slime capsule
Plasmid
What two adaptations do bacteria cells sometimes have that are not shown on the image?
Cell wall
Flagella
Slime capsule
Plasmid
Nucleus
Which of the following are true of a eukaryotic cell? Choose all that apply.
DNA stored in a nucleus
Examples include animal and plant cells
A cell that has no membrane bound organelles
Genetic material is free in the cytoplasm
Examples include bacteria cells
Which of the following are true of a prokaryotic cell? Choose all that apply.
DNA stored in a nucleus
Examples include animal and plant cells
A cell that has no membrane bound organelles
Genetic material is free in the cytoplasm
Examples include bacteria cells
What is the function of a plasmid?
Circular ring of DNA in bacteria cells, contains the “optional” genes e.g. antibiotic resistance
Allows bacteria to adhere to surfaces and provides a protective layer
Allows the cell to move
It is where DNA is stored as chromosomes
Which type of cell does not have a nucleus?
Red blood cell
Root hair cell
Sperm cell
White blood cell
Why does a red blood cell have a biconcave disc shape?
Allows more haemoglobin to fit inside the cell
Allows the cell to be flexible and move through the vessels
Increases surface area for diffusion of oxygen
Allows oxygen to reversibly bind to be delivered to the cells
What is the role of the acrosome of the sperm cell?
It is the tail that causes the cell to move
Provides energy for movement through aerobic respiration
Contains digestive enzymes allowing the sperm to enter the egg
It is a nucleus that contains only half of the genetic information
What part of a cell contains lots of nutrients for a fertilised egg to develop into an embryo?
Cytoplasm
Nucleus
Mitochondria
Ribosome
Which of the following have a haploid nucleus?
Egg cell
Muscle cell
Root hair cell
Sperm cell
Red blood cell
Why does a white blood cell have a lobed nucleus?
Allows the cell to digest bacteria
Allows the cell to be flexible and move through the blood vessels
Increases surface area for diffusion
Allows oxygen to reversibly bind to be delivered to the cells
Which of the following is not an adaptation of a root hair cell?
Large permanent vacuole to allow water to enter the cell by osmosis
Lots of chloroplasts for photosynthesis
Many mitochondria to provide energy for active transport
Long projection to increase surface area
Which of the following are true for xylem?
Transport water and dissolved ions
Transport glucose and amino acids
Made of living cells
Made of dead cells
Continuous tubes strengthened by lignin
Which of the following are true for phloem?
Transport water and dissolved ions by transpiration
Transport glucose and amino acids by translocation
Made of living cells
Made of dead cells
Can only transport substances up the plant
What is the role of a neuron?
Transmits signals around the body as an electrical impulse
Releases hormones to send signals around the body
Transports glucose and amino acids up and down a plant
Contains a pigment called haemoglobin for transporting oxygen
What is the definition of a chromosome?
A chemical that codes all the information to make a specific organism
A part of the chemical that codes for a particular protein
A large part of DNA containing lots of genes
An organelle that contains the cells DNA
What is the definition of a gene?
A chemical that codes all the information to make a specific organism
A part of the chemical that codes for a particular protein
A large part of DNA containing lots of genes
An organelle that contains the cells DNA
How many chromosomes do humans have?
46 pairs
23 chromosomes
46 chromosomes
26 pairs
What is the sex of this person? How do you know?
This person is male because they have 23 chromosomes
This person is female because they have an X chromosome
This person is male because they have an X and a Y chromosome
This person is female because they have an X and Y chromosome
What does DNA stand for?
Deoxyribonucleic acid
Deoxygenribonucleic acid
Deoxyribo nucleus acid
Deoxyribonuclease acid
What is the correct order of the cell cycle?
3, 1, 5, 2, 4
3, 5, 1, 2, 4
5, 1, 3, 2, 4
5, 3, 1, 4, 2
Why is it important the DNA is replicated before the cell cycle?
2 daughter cells are made and they both need the same DNA as the parent
2 daughter cells are made and they both need the half of the DNA that the parent has
1 daughter cell is made that needs to have twice as much DNA as the parent
1 daughter cell is made that needs to have half as much DNA as the parent
What is the definition of mitosis?
The splitting of the cytoplasm at the end of mitosis to form 2 daughter cells.
A type of cell division where the cell reproduces itself by splitting to form 2 identical daughter cells.
The process in which a cell becomes specialised for its job.
A type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell.
What is the definition of cytokinesis?
The splitting of the cytoplasm at the end of mitosis to form 2 daughter cells.
A type of cell division where the cell reproduces itself by splitting to form 2 identical daughter cells.
The process in which a cell becomes specialised for its job.
A type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell.
Which of these is not a purpose of mitosis?
Replacing damaged cells
Producing gametes
Growth of an organism
Development of an embryo
Which of the following statements are true for embryonic stem cells?
Undifferentiated cells
Taken from bone marrow
Taken from human embryos
Can differentiate into all cell types
Can differentiate into some cell types
Which of the following statements are true for adult stem cells?
Undifferentiated cells
Taken from bone marrow
Taken from human embryos
Can differentiate into all cell types
Can differentiate into some cell types
What is the definition of meristem cells?
Undifferentiated cells taken from bone marrow, they can differentiate into some cell types.
Undifferentiated cells taken from embryos, they can differentiate into any cell type.
Plant stem cells found at the tips of roots and shoots. They can differentiate throughout a plants life.
Cells that have become specialised to perform a particular function.
What is the definition of differentiation?
The splitting of the cytoplasm at the end of mitosis to form 2 daughter cells.
A type of cell division where the cell reproduces itself by splitting to form 2 identical daughter cells.
The process in which a cell becomes specialised for its job.
A type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell.
Where do embryonic stem cells come from?
"Spare" embryos left from IVF
Taken from a pregnant woman
Taken from the bone marrow of young children
Umbilical cord blood
Why might somebody object to using embryonic stem cells?
The procedure is painful
They believe it is unethical to "take a human life"
They are great at treating many diseases
The procedure is has been completed successfully in the past
Why might somebody object to using adult stem cells?
The procedure of extracting the cells painful
They believe it is unethical to "take a human life"
They are great at treating many diseases
The procedure is has been completed successfully in the past
Where are plant stem cells found?
Tips of shoots and roots
Inner layer of the leaf
Throughout the stem
Petals of the flower
What are stem cells used for?
Improving the immune system after chemotherapy
Replacing damaged spinal tissue in paralysis
Replacing cells to cure diabetes
All of the above
Why might somebody agree with the use of embryonic stem cells?
They have the ability to cure many diseases
The embryos would otherwise be destroyed and wasted
They consider an embryo to be a human life
The method is relatively new and untested
What is the definition of resolution?
The ability to distinguish between two points
The act of enlarging the physical appearance of an object.
Making the actual size of the object you are looking at bigger
Looking through a microscope to view an object
What is the definition of magnification?
The ability to distinguish between two points
Enlarging the physical appearance of an object.
Making the actual size of the object you are looking at bigger
Looking through a microscope to view an object
What are the benefits of a light microscope?
Higher magnification
Higher resolution
Cheap to buy
Simple to use
What are the negatives of using an electron microscope?
Lower magnification
Lower resolution
More expensive to buy
Requires specialist training to use
Why can you only view dead specimens under an electron microscope?
Electron microscopes need specific conditions to work (a vacuum)
Electron microscopes use a beam of electrons to view the specimin
Electron microscopes have a high magnification and resolution
Electron microscopes require specialist training
Put these stages of preparing a slide to observe onion cells with a microscope in the correct order.
6, 4, 3, 1, 5, 2
6, 4, 1, 3, 5, 2
6, 4, 3, 5, 1, 2
6, 3, 1, 4, 2, 1
What precautions do we take to minimise the hazard of iodine?
Iodine is an irritant so we wear safety goggles
Iodine is flammable so we keep away from Bunsen burners
Iodine has no hazard associate with it - it's safe
Iodine is hazardous to the environment so we don't put it down the sink
Choose the correct equation for calculating magnification
Magnification = image size / actual size
Magnification = actual size / image size
Magnification = actual size x image size
Magnification = image size x resolution
Choose the correct equation for calculating image size
Image size = actual size x magnification
Image size = actual size / magification
Image size = magnification / actual size
Choose the correct equation for calculating actual size
Actual size = image size / magnification
Actual size = image size x magnification
Actual size = magnification / image size
How do you convert from mm to µm?
multiply by 100
multiply by 1000
divide by 1000
divide by 100
What do the units µm stand for?
Millimetre
Nanometre
Micrometre
Picometre
A student measures an image of a cell to be 63mm. The image has been magnified x2000. What is the actual size of the cell in micrometres?
31.5
0.0315
31.7
0.0317
An image of a mitochondria has been magnified x1800. The actual size of the mitochondria is 2µm. What is the image size? Give your answer in mm.
3.6
3600
900
0.9
A bacteria is 11µm long. When magnified it appears to be 17mm. How much has the image been magnified?
x1545
x1.545
x187
x187000
What class are you in?
9Arc
9Euc
9Ari
9Hip
9Her
