The Z-scheme of photosynthesis produces a 3:2 ratio of ATP:NADPH. How does a C 4 plant compensate for the greater ATP requirement created by the C 4 pathway?

Cyclic photophosphorylation is used to produce additional ATP without producing NADPH, which helps meet the higher ATP demand of the C4 pathway.

The Z-scheme of photosynthesis produces a 3:2 ratio of ATP:NADPH. How does a C 4 plant compensate for the greater ATP requirement created by the C 4 pathway?

Cyclic photophosphorylation is used to produce additional ATP without producing NADPH, which helps meet the higher ATP demand of the C4 pathway.

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The Z-Scheme of Photosynthesis Produces a 3:2 Ratio of ATP:NADPH

Question 15

Multiple Choice

The Z-scheme of photosynthesis produces a 3:2 ratio of ATP:NADPH. How does a C₄ plant compensate for the greater ATP requirement created by the C₄ pathway?

A) no changes need to be made since there is more ATP available from the light reactions than actually needed for carbon fixation
B) no cyclic photophosphorylation can occur
C) more cyclic photophosphorylation must occur
D) oxygen production must be increased at photosystem II
E) oxygen production must be decreased at photosystem II

Correct Answer: