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Activity 1: Structure and Function of Cells
Q1.The following is a diagram of a typical plant cell.
(a)
Identify the parts labelled A to D.
Part
Name
A
B
C
D
(b)
Which structure, not shown in the diagram, can be found in plant cells but
never in an animal cell?
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(c)
(2)
(1)
What is the purpose of staining a cell and what reagent is used to do so?
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(2)
Q2. Read the passage and answer the following questions.
Euglena viridis is a unicellular organism found living in stagnant pondwater. It
swims by means of its long whip-like flagellum, movements of which draw the
organism forwards. It is able to feed both by photosynthesis and by taking in
organic substances present in the water. It uses its contractile vacuole to
discharge unwanted water into the reservoir and then to the outside of the cell.
Its eye spot and photoreceptor are used to guide it towards light.
(a)
What is the function of Euglena's flagellum?
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(b)
(1)
Suggest why the Euglena is often found living in water containing rotting
organic matter.
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(1)
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(c)
Why is it of benefit to Euglena to be able to swim towards light?
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(1)
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(d)
Identify one structural feature possessed by Euglena that is often found in
plant cells but never in animal cells.
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(e)
(1)
In what way does Euglena contradict the idea that every living thing can
definitely be classified as either a plant or an animal?
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(2)
Q3.The following is a diagram of a single-celled organism.
(a)
Why could this organism be described as a single-celled plant?
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(b)
(1)
Why could this organism be described as a single-celled animal?
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(1)
Q4. The structure of a yeast cell is drawn below.
Nucleus
Cytoplasm
Cell membrane
Cell wall
(a)
The presence of which structure suggests that the yeast cell could belong to
the plant kingdom?
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(b)
The absence of which structure would suggest that the yeast cell is a
consumer and not a producer?
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(c)
(1)
(1)
To which kingdom does yeast actually belong?
(1)
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d) The yeast cell illustrated is 026 millimetres in length. Express the length of
the yeast cell in micrometres given that 1 millimetre = 1000 micrometres.
Space for calculation
___________ µm
(1)
Activity 1 Total: _____ / 17
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