| Date | November 2014 | Marks available | 1 | Reference code | 14N.1.HL.TZ0.12 |
| Level | Higher level | Paper | Paper 1 | Time zone | TZ0 |
| Command term | Question number | 12 | Adapted from | N/A |
Question
What causes cyclic photophosphorylation to occur in photosynthesis?
A. Reduced NADP is accumulating in the stroma.
B. Photoactivation of photosystem II is inhibited.
C. Light-dependent reactions are slower than light-independent reactions.
D. ATP is not required for the Calvin cycle.
Markscheme
A
Examiners report
Comments on this question varied from congratulations on a novel approach to the fact that it was tough and not on the syllabus. It is covered by 8.2.3 ‘explain the light dependent reactions’.
Syllabus sections
Additional higher level » Topic 8: Metabolism, cell respiration and photosynthesis » 8.2 Cell respiration
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