Where Do the Light Reactions of Photosynthesis Occur

Question

Where do the light reactions of photosynthesis occur?
A) stroma
B) outer chloroplast membrane
C) thylakoids
D) rubisco

Accepted Answer

The light reactions of photosynthesis occur in the thylakoids of chloroplasts. This is where the pigments and electron transport chain are located. A) Stroma is the site of the Calvin cycle, which is the second stage of photosynthesis. B) The outer chloroplast membrane is important for regulating what enters and leaves the chloroplast, but it does not play a direct role in the light reactions. D) Rubisco is an enzyme involved in the Calvin cycle, not the light reactions.