Question

what gas is used during the light - independent reactions?
o a hydrogen
o b nitrogen
o c carbon dioxide
o d oxygen
question 31 (1 point)
what is the main product of the light - independent reactions?
o a water
o b atp
o c oxygen
o d carbohydrates such as glucose

Explanation:

• In light - independent reactions (Calvin cycle) of photosynthesis, carbon dioxide ($CO_2$) is used. It combines with ribulose bisphosphate (RuBP) in the first step of the cycle.
• The main product of the light - independent reactions is carbohydrates such as glucose. The Calvin cycle uses the ATP and NADPH from the light - dependent reactions to convert $CO_2$ into glucose.

Answer:

• For the first question: C. Carbon dioxide
• For the second question: D. Carbohydrates such as glucose