1 (a) Fig. 1.1 is a diagram representing a three-dimensional view of a chloroplast.
A
space B
C
Fig. 1.1
(i) Name parts A to C in Fig. 1.1.
A ........................................................................................................................................
B ........................................................................................................................................
C ................................................................................................................................... [3]
(ii) Describe two ways in which the structure of part C is adapted to its function.
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, (iii) A key aspect of photosynthesis is the metabolic pathway involving carbon dioxide.
Place a tick (✓) in the appropriate box to indicate the part of the chloroplast (A, B or C) in
which the metabolic pathway involving carbon dioxide is located.
A
B
C
[1]
(b) Fig. 1.2 shows the theoretical and actual relationship between light intensity and the rate of
photosynthesis.
Key:
theoretical
actual
rate of
photosynthesis
light intensity
Fig. 1.2
With reference to the biochemistry of photosynthesis, explain why the theoretical rate of
photosynthesis is not achieved at higher light intensities.
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.............................................................................................................................................. [2]
PhysicsAndMathsTutor.com
A
space B
C
Fig. 1.1
(i) Name parts A to C in Fig. 1.1.
A ........................................................................................................................................
B ........................................................................................................................................
C ................................................................................................................................... [3]
(ii) Describe two ways in which the structure of part C is adapted to its function.
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...........................................................................................................................................
...................................................................................................................................... [2]
PhysicsAndMathsTutor.com
, (iii) A key aspect of photosynthesis is the metabolic pathway involving carbon dioxide.
Place a tick (✓) in the appropriate box to indicate the part of the chloroplast (A, B or C) in
which the metabolic pathway involving carbon dioxide is located.
A
B
C
[1]
(b) Fig. 1.2 shows the theoretical and actual relationship between light intensity and the rate of
photosynthesis.
Key:
theoretical
actual
rate of
photosynthesis
light intensity
Fig. 1.2
With reference to the biochemistry of photosynthesis, explain why the theoretical rate of
photosynthesis is not achieved at higher light intensities.
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
...................................................................................................................................................
.............................................................................................................................................. [2]
PhysicsAndMathsTutor.com
