CAMRBRIDGE SCIENCE CHECKPOINT STAGE 7
REVISION UNIT 1. CELLS
Name: ………………………………………………………………………………………………………………........
1 For each of the following group of statements, circle the letter representing for the correct statement.
Group 1:
A. Cells are bigger than tissues.
B. Cells are smaller than organs.
C. Organs are bigger than organ systems.
D. Organs are smaller than tissues.
Group 2:
A. Nerve cells contain haemoglobin.
B. Nerve cells contain no nucleus.
C. Nerve cells contain dendrites.
D. Nerve cells contain no axon.
Group 3:
A. Cytoplasm takes up the largest space in an animal cell.
B. Cytoplasm is mainly made of sugar.
C. Cytoplasm controls what goes in and out the cell.
D. Cytoplasm is only found in animal cells.
Group 4:
A. Chloroplast is found in animal cells.
B. Chloroplast is found in root hair cells.
C. Chloroplast is found in leaf cells.
D. Chloroplast is found in red blood cells.
Group 5:
A. Heart is an organ, muscle is a tissue.
B. Muscle is a tissue, heart is an organ.
C. Blood is an organ, blood vessel is a tissue.
D. Blood is an organ, blood vessel is a tissue.
Group 6:
A. The size of the cells is big.
B. The cells have green color.
C. The size of the cells is tiny.
D. The cells have blue color.
Total: … / 6
1
2 The diagram below shows a root hair cell.
(a) Root hair cell is classified as a specialised cell.
Define specialised cell.
A specialised cell is a cell that is made to do something. It has a shape or parts that help do the thing
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(b) As you can see on the diagram, root hair cell does not contain chloroplasts.
Even if root hair cell contained chloroplasts, the chloroplasts would be useless.
Explain why.
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Root hair cells are under the ground where there is no sunlight, chloroplasts need sunlight to work,
so they would be useless in root hair cells
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……………………………………………………………………………………………………………….. [3]
(c) Other than not having chloroplasts, state one special structure of root hair cell that you see on the
diagram then explain how this structure is useful.
other special structure ………………………………………………………………………………………
Long hair shape [1]
this structure is useful because ……………………………………………………………………………….
It gives the cell more surface area to take in water and minerals
from the soil
………………………………………………………………………………………………………………... [1]
Total: … / 7
3 There are many organ systems in human body.
(a) Arrange the following terms from largest unit to smallest unit.
cell organ organ system tissue organism
Organism Organ
Organsystem
system Organ
Organ Tissue
Tissue Cell
Cell
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Organism [1]
(b) Define organ system.
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………………………………………………………………………………………………………………... [2]
(c) Name two organ systems in human body.
1. ……………………………………………………………………………………………………………………
2. ………………………………………………………………………………………………………….…….. [2]
2
Total: … / 5
4 The diagram shows a device used to observe cells.
(a) Name this device.
……………………………………………………………………………………………………………...… [1]
(b) Circle the lens of this device, on the diagram. [1]
(c) Give a reason why we have to use this device to see the cells.
……………………………………………………………………………………………………………...… [1]
Total: … / 3
5 Red blood cells are specialised cells.
Unlike regular animal cells, red blood cells do not have nucleus and they contain haemoglobin.
(a) Explain why having no nucleus is an advantage of red blood cells.
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………………………………………………………………………………………………………………... [2]
(b) (i) What color is the haemoglobin?
………………………………………………………………………………………………………………... [1]
(ii) What is the function of haemoglobin?
………………………………………………………………………………………………………………... [1]
Total: … / 4
3
6 The below diagram shows a root hair cell.
(a) Identify all the labelled parts on the diagram.
A. ……………………………………………..
B. ……………………………………………..
C. ……………………………………………..
D. …………………………………………….. [4]
(b) The root hair cells form root tissue in a plant.
Define tissue.
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………………………………………………………………………………………………………………... [2]
Total: … / 6
7 Xylem cell is of specialised cells found in plants, it is found in the stem.
Xylem is the way of transporting water and mineral through all the plant.
For each of the following special structures, explain how the structure helps xylem to perform its function.
(a) Outer cells are not living, they do not have nucleus.
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………………………………………………………………………………………………………………... [2]
(b) No end between cells, the cell wall disappears partially.
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4
………………………………………………………………………………………………………………... [2]
Total: … / 4
8 The diagram below shows a plant cell.
(a) Identify all the labelled parts in the diagram and describe their functions.
Fill in the table.
labelled part name function
[8]
(b) On the diagram, add two more labels:
- Label A (with a line) for the cell membrane. [1]
- Label B (with a line) for the cell wall. [1]
(c) Three parts of a plant cell are not found in an animal cell.
Name these parts.
1. ………………………………………………………………………………………………………………..
2. ………………………………………………………………………………………………………………..
3. …………………………………………………………………………………………………………… [3]
Total: … / 13
