It is believed that the ratio of cyclic photophosphorylation to noncyclicphotophosphorylation changes in response to metabolic demands. Ineach of the following situations, would you expect the ratio to increase,decrease, or remain unchanged?(a) Chloroplasts carrying out both the Calvin cycle and the reduction ofnitrite (NO2-) to ammonia (This process does not require ATP.)(b) Chloroplasts carrying out not only the Calvin cycle but also extensiveactive transport(c) Chloroplasts using both the Calvin cycle and the C4 pathway
It is believed that the ratio of cyclic photophosphorylation to noncyclic
photophosphorylation changes in response to
each of the following situations, would you expect the ratio to increase,
decrease, or remain unchanged?
(a) Chloroplasts carrying out both the Calvin cycle and the reduction of
nitrite (NO2-) to ammonia (This process does not require ATP.)
(b) Chloroplasts carrying out not only the Calvin cycle but also extensive
active transport
(c) Chloroplasts using both the Calvin cycle and the C4 pathway
Cyclic photophosphorylation is a phosphorylation process used by prokaryotes for movement of electrons in a cyclic manner for synthesizing ATP molecules. This occurs in the thylakoid membrane. While noncyclic photophosphorylation takes place in photosystem II in a noncyclic manner.
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