Question

where does the light reaction of photosynthesis take place?
a) in the chloroplast lumen
b) in the stroma of the chloroplast
c) in the plasma membrane
d) in the thylakoid membrane

Explanation:

The light reaction of photosynthesis relies on light-harvesting complexes, electron transport chains, and ATP synthase, all of which are embedded in the thylakoid membrane. The chloroplast lumen is the space inside thylakoids (involved in proton accumulation), the stroma is where the Calvin cycle (dark reaction) occurs, and the plasma membrane is not involved in photosynthetic light reactions.

Answer:

d) In the thylakoid membrane