Question

multiple choice question
where are the enzymes that catalyze the reactions of the calvin cycle located?

the stroma

in photosystem i

the thylakoid space

in photosystem ii

Explanation:

The Calvin cycle is the light - independent reaction of photosynthesis. The enzymes that catalyze the reactions of the Calvin cycle are located in the stroma of the chloroplast. Photosystem I and Photosystem II are involved in the light - dependent reactions, and the thylakoid space is also related to the light - dependent reactions (e.g., proton accumulation for ATP synthesis). So the correct option is the one that says "the stroma".

Answer:

A. the stroma (assuming the first option is labeled A, if not, adjust the label according to the actual question's option numbering. But based on the content, the correct option is the one with "the stroma")