Question

Which is the site of dark reaction?

(a) Matrix

(b) Stroma

(c) Cytochrome

(d) Roots

I had been asked this question in a national level competition.

This is a very interesting question from Sites of Photosynthesis in a Plant Cells topic in portion Photosynthesis in Higher Plants of Biology – Class 11

Answer 1

Correct answer is (b) Stroma

To elaborate: Stroma is the site of dark reaction which is an enzymatic as well as light-independent reaction. Stroma is a colorless fluid that surrounds the grana and thylakoids. It also contains other sub organelles and daughter cells that supports dark reaction.