Question

which compound is a metabolic intermediate of the light - independent reactions in photosynthesis?
atp
pga
rubp
nadph

Explanation:

• ATP: It is mainly produced in the light - dependent reactions of photosynthesis.
• PGA (3 - phosphoglyceric acid): In the Calvin cycle (light - independent reactions), carbon dioxide combines with RuBP (ribulose - 1,5 - bisphosphate) to form PGA. So, PGA is a metabolic intermediate in the light - independent reactions.
• RuBP: It is a starting molecule in the Calvin cycle (light - independent reactions) for carbon fixation, not an intermediate in the sense of being formed during the reaction sequence in the same way as PGA.
• NADPH: It is produced in the light - dependent reactions of photosynthesis.

Answer:

PGA