Question

Carbon dioxide produces three carbon sugar by the process of

• A. Photosystem- I.
• B. Photosystem- II.
• C. Electron transport chain.
• D. Calvin cycle.
• E. Citric acid cycle.

Answer 1

The correct option is D Calvin cycle.

The citric acid cycle is the second phase of cellular respiration in which acetyl coA is enzymatically oxidized to carbon dioxide. Electron transport chain includes the transfer of electrons from NADH and $FAD{H}_2$ through a series of protein complexes to final electron acceptor oxygen. Photosystem I and II serve to trap sunlight during light reaction of photosynthesis. Calvin cycle starts with carboxylation of RuBP catalyzed by RUBISCO followed by immediate splitting of unstable product into 3 phosphoglyceric acid (3 carbon sugar). Thus, the correct answer is D.