BIOLOGY HOLIDAY ASSIGNMENT
Q1.
A student prepared some animal cells to view using a microscope.
Figure 1 shows the student preparing the cells.
Figure 1
(a) Name two pieces of laboratory equipment the student could have used to
prepare cells to view using a microscope.
2
(2)
Figure 2 shows the student’s light microscope.
Figure 2
(b) Name part A.
(1)
(c) What is the function of part B?
(1)
(d) The student tried to look at the cells using the microscope.
Suggest one reason why the student could not see any cells when looking
through part A.
(1)
(e) Red blood cells are specialised animal cells.
Compare the structure of a red blood cell with the structure of a plant cell.
(6)
(f) When placed into a beaker of water:
• a red blood cell bursts
• a plant cell does not burst.
Explain why the red blood cell bursts but the plant cell does not burst.
(2)
(Total 13 marks)
Q2.
This question is about cells.
(a) Which diagram shows oxygen moving by diffusion?
Tick (✓) one box.
(1)
(b) Complete the sentences.
Choose answers from the box.
carbon dioxide chlorophyll energy
light mineral ions water
Plant cells absorb substances from the soil.
Plant cells use osmosis to absorb .
Plant cells use active transport to absorb
.
Active transport moves substances against the concentration gradient and
needs
.
(3)
Figure 1 shows a specialised cell that absorbs substances from the soil.
Figure 1
(c) Name the type of specialised cell in Figure 1.
(1)
(d) Describe how the cell in Figure 1 is adapted to increase the absorption of
substances from the soil.
(1)
A sperm cell is another specialised cell.
Figure 2 shows a sperm cell.
Figure 2
(e) Draw one line from each feature to how the feature helps the sperm cell
carry out its function.
Feature of sperm cell How the feature helps
To break the outer
layer of the egg
Contains a nucleus
To help the cell to swim
to the egg
To provide the
chromosomes for
fertilisation
Has a long tail
To release energy
(2)
Figure 3 shows another specialised cell.
Figure 3
(f) Name the type of cell in Figure 3.
Describe one feature of the cell that helps it to carry out its function.
Name of the
cell
Feature of the
cell
(2)
(Total 10 marks)
Q4.
Figure 1 shows a cross section of a leaf.
Figure 1
(a) Which cell is most transparent?
Tick (✓) one box.
A B C D
(1)
AQA Biology GCSE - Cell Structure PhysicsAndMathsTutor.com
(b) Which cell structure in a leaf mesophyll cell is not found in a root hair cell?
(1)
Plants lose water through their leaves.
(c) Name the cells in a leaf that control the rate of water loss.
(1)
(d) Water is taken in by the roots, transported up the plant and lost from the
leaves.
Which scientific term describes this movement of water?
(1)
(e) Which change would decrease the rate of water loss from a plant’s leaves?
Tick (✓) one box.
Increased humidity
Increased light intensity
Increased density of stomata
Increased temperature
(1)
(f) Compare the structure and function of xylem tissue and phloem tissue.
Page 7 of 33
AQA Biology GCSE - Cell Structure PhysicsAndMathsTutor.com
(6)
Figure 2 shows the total volume of water lost from a plant over 6 hours.
Figure 2
(g) Determine the rate of water loss at 12:00
Use the tangent on the graph above.
Give your answer:
• in cm3 per minute
• in standard form.
Page 8 of 33
AQA Biology GCSE - Cell Structure PhysicsAndMathsTutor.com
Rate of water loss = cm3 per minute
(4)
(h) The rate of water loss at midnight was much lower than at 12:00
Explain why.
(2)
(Total 17 marks)
Q5.
This question is about cells.
(a) Figure 1 shows a cell.
Figure 1
What type of cell is shown in Figure 1?
Tick (✓) one box.
Animal
Bacterium
Plant
(1)
Page 9 of 33
Figure 2 shows an algal cell.
Figure 2
(b) What is the function of the cell wall?
Tick (✓) one box.
To contain the genetic material
To stop the chloroplasts leaking out
To strengthen the cell
(1)
(c) The algal cell is green.
Which part of the algal cell makes it green in colour?
Tick (✓) one box.
Cellulose
Chloroplast
Cytoplasm
Nucleus
(1)
Page 10 of 33
(d) Cells contain sub-cellular structures.
Draw one line from each structure to its function.
(3)
A student prepared a microscope slide of cheek cells.
The student looked at one cell using a microscope.
Figure 3 shows the image the student saw.
Figure 3
Page 11 of 33
(e) What should the student do to get a clear image?
Tick (✓) one box.
Adjust the focus knob
Make the light dimmer
Put water on the slide
(1)
The student then obtained a clear image.
Figure 4 shows the clear image.
Figure 4
(f) Measure the length of the nucleus (A) and the length of the cell (B) in
millimetres (mm).
A= mm
B= mm
(2)
(g) How many times longer is the cell (B) than the nucleus (A)?
Number of times longer =
(1)
Page 12 of 33
(h) The student looked at another cell.
The image width of the cell was 40 mm
The real width of the cell was 0.1 mm
Calculate the magnification of the cell.
Use the equation:
Magnification = ×
(2)
(Total 12 marks)
Q6.
The diagram below shows three types of cell.
(a) Give two similarities between the prokaryotic cell and the eukaryotic cells
in the diagram above.
2
(2)
Page 13 of 33
(b) Give three differences between the prokaryotic cell and the eukaryotic cells
in the diagram above.
(3)
(c) Calculate the ratio of the size of the bacterial cell to the size of the
mesophyll cell.
Ratio = 1 :
(2)
(d) Name the type of cell division that produces genetically identical body cells
for growth and repair.
(1)
Page 14 of 33
Q7.
Figure 1 shows an animal cell viewed using a microscope.
Figure 1
(a) The cell contains a nucleus.
What is the function of the nucleus?
(1)
(b) Name one type of cell that does not contain a nucleus.
(1)
Page 15 of 33
(c) Draw a simple diagram of the cell in Figure 1.
Label two parts of the cell.
(2)
(d) Name one structure found in a plant cell but not found in an animal cell.
(1)
Figure 2 shows some different cells.
Figure 2
(e) The real length from point X to point Y is 0.06 mm
Calculate the magnification.
Use the equation:
Page 16 of 33
MathsTutor.com
Magnificatio
n=×
(f) The cells shown in Figure (3)
Give two advantages of us2 were viewed using a light microscope.
microscope.
ing an electron microscope instead of a light
1
(2)
(Total 10 marks)
Q8.
Plants are made up of cells, tiss
(a) Draw one line from each ues and organs.
Level of organisation level of organisation to the correct plant part.
Plant part
Leaf
Organ Root hair
Spongy mesophyll
Tissue Vacuole
Xylem cell
(2)
Page 17 of 33
Figure 1 shows a plant cell drawn to scale.
(b) Where in a plant would the cell in Figure 1 be found?
Tick one box.
Epidermis
Palisade mesophyll
Phloem
Xylem
(1)
(c) Calculate the length of the chloroplast labelled in Figure 1.
Length = micrometres
(2)
Page 18 of 33
(d) Cells in plant roots do not photosynthesise.
Give one reason why.
(1)
(e) As a plant grows, new root hair cells are formed from unspecialised cells.
How does an unspecialised cell become a new root hair cell?
Tick one box.
Differentiation
Metabolism
Transpiration
Transport
(1)
(Total 7 marks)
Page 19 of 33
Q9.
Cells can be classified according to their structure.
(a) Complete Table 1 to show which features each cell type has.
Write a tick or a cross in each box.
Table 1
Nucleus Plasmids Cytoplasm
Prokaryotic cell
Eukaryotic cell
(2)
Figure 1 shows a cell.
(b) What type of cell is shown in Figure 1.
Tick one box.
An animal cell
A bacterial cell
Page 24 of 33
A plant cell
(1)
(c) The cell in Figure 1 contains ribosomes.
What is the function of ribosomes?
(1)
(d) There are 1000 micrometres (μm) in a millimetre (mm).
The length of the cell in Figure 1 is 1.5 micrometres (μm).
Give the length of the cell in millimetres (mm).
Length of cell = mm
(1)
Figure 2 shows a mitochondrion viewed with a microscope.
(e) Give one reason why the cell in Figure 1 does not contain mitochondria.
Use information from Figure 1 and Figure 2.
(1)
Page 25 of 33
The cell in Figure 1 divides once every 30 minutes. (separate only)
Table 2 shows how many cells are present after a given time.
Table 2
Time in Number of cells
minutes present
0 1
30 2
60 4
(f) Calculate how many cells will be present after 2 hours. (separate only)
Number of cells =
(2)
Cells like the one in Figure 1 are kept in a culture solution for 25 hours.
The graph below shows the number of live cells present.
(g) Describe the changes in the number of live cells shown in the graph above
in the first 20 hours. (separate only)
Page 26 of 33
Use data from the graph in your answer.
(3)
(h) Suggest one reason why the number of live cells decreases after 20 hours.
(separate only)
(1)
(Total 12 marks)
Q10.
The image below shows part of a root from a cress plant.
(a) What type of microscope was used to create the image above?
(1)
Page 27 of 33
(b) The magnification of the cress root in the image above is × 200.
There are 1000 micrometres (μm) in a millimetre (mm).
Calculate the real length of the root hair, X.
Give your answer in micrometres (μm).
Real length X = μm
(2)
(c) Root hair cells take up water from the soil.
Explain one way in which the root hair cell is adapted to this function.
(2)
The table shows the water uptake by a plant’s roots on two different days.
Mean water uptake in cm3 per hour
Cold day 1.8
Hot day 3.4
(d) Explain why the mean rate of water uptake is higher on a hot day than on a
cold day.
(3)
Page 28 of 33
(e) The concentration of mineral ions in the soil is lower than in root hair cells.
Root hair cells take up mineral ions from the soil.
Root hair cells contain mitochondria.
Explain why root hair cells contain mitochondria.
(4)
(Total 12 marks)
Q11.
Figure 1 shows a human cheek cell viewed under a light microscope.
Figure 1
© Ed Reschke/Photolibrary/Getty Images
(a) Label the nucleus and cell membrane on Figure 1.
(2)
Page 29 of 33
(b) Cheek cells are a type of body cell.
Body cells grow through cell division.
What is the name of this type of cell division?
Tick one box.
Differentiation
Mitosis
Specialisation
(1)
(c) Ribosomes and mitochondria are not shown in Figure 1.
What type of microscope is needed to see ribosomes and mitochondria?
(1)
(d) What is the advantage of using the type of microscope you named in part
(c)?
Tick one box.
Cheaper
Higher magnification
Lower resolution
(1)
Page 30 of 33
(e) The cheek cell in Figure 2 is magnified 250 times.
The width of the cell is shown by the line D to E.
Figure 2
Calculate the width of the cheek cell in micrometres (µm).
Complete the following steps.
Measure the width of the cell using a ruler
mm
Use the equation to work out the real width of the cell in mm:
real size =
mm
Convert mm to µm
µm
(3)
(f) A red blood cell is 8 µm in diameter.
A bacterial cell is 40 times smaller.
Calculate the diameter of the bacterial cell.
Tick one box.
0.02 µm
0.2 µm
2.0 µm
Page 31 of 33
20.0 µm
(1)
(Total 9 marks)
Q12.
Living organisms are made of cells.
(a) Animal and plant cells have several parts. Each part has a different
function.
Draw one line from each cell part to the correct function of that part.
(3)
Page 32 of 33
(b) The diagram below shows a cell from a plant leaf.
Which two parts in the diagram above are not found in an animal cell?
1.
2.
(2)
(Total 5 marks)
Page 33 of 33
