Which of the following is a product of the Calvin cycle? A. oxygen B. glucose sugar C. ATP D. carbon dioxide

Answer: B. glucose sugar

Explanation: In Calvin cycle, carbon dioxide is reduced to sugars.

Calvin cycle occurs in three stages:

1). The condensation of carbon dioxide with a five-carbon sugar ribulose 1, 5 - bisphosphate to form two molecules of 3-phospho glycerate. This reaction is catalyzed by ribulose 1,5-bisphosphate carboxylase or rubisco.

2) 3-phosphoglycerate is reduced to glyceraldehyde 3-phosphate (a triose phosphate). This reaction is catalyzed by glyceraldehyde 3-phosphate dehydrogenase. The triose phosphate is then converted to starch in the Chloroplast and stored for later use.

3). Ribulose 1, 5-bisphosphate is regenerated from triose phosphates.