Question

which enzyme catalyzes the calvin cycle?
carbon reductase
rubisco
atp synthase

Explanation:

The key enzyme in the Calvin - cycle is RuBisCo (Ribulose - 1,5 - bisphosphate carboxylase/oxygenase). It catalyzes the first major step of carbon fixation, which is the addition of carbon dioxide to ribulose - 1,5 - bisphosphate. Carbon reductase is not the main enzyme for the Calvin cycle, and ATP synthase is involved in ATP production during processes like oxidative phosphorylation and photosynthetic electron - transport, not directly in catalyzing the Calvin cycle.

Answer:

RuBisCo