The light reactions of photosynthesis occur in the thylakoid membranes of the chloroplasts, where light energy is converted into chemical energy, while the Calvin cycle (dark reactions) takes place in the stroma, utilizing the energy produced by the light reactions to fix carbon dioxide into sugars.

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In Chloroplasts

Question 12

Multiple Choice

In chloroplasts,

A) the light reactions take place in the thylakoid disks, whereas the dark reactions occur in the stroma
B) the dark reactions take place in the thylakoid disks, whereas the light reactions occur in the stroma
C) the light reactions take place in the thylakoid space, whereas the dark reactions occur in the stroma
D) the dark reactions take place in the thylakoid space, whereas the light reactions occur in the stroma
E) none of these

Correct Answer: