Question

The site of light reaction and dark reaction of photosynthesis is

(A) Grana (B) Stroma

(C) Stroma and grana respectively (D) Grana and stroma respectively​

Answer 1

Answer:

Photosynthesis takes place in two major steps, light reaction, and dark reaction. ATP and NADPH

2

is formed during the dark reaction which is utilized for fixation of carbon during the dark reaction.

Carbon-fixing during the dark reaction (light independent process) takes place in the stroma of the chloroplast. The light reactions of photosynthesis occur in the thylakoids of grana present in the chloroplast.

So, the correct answer is option A.

Answer 2

• The chloroplast is involved in both stages of photosynthesis. The light reaction takes place in the thylakoid discs. Note that the dark reaction takes place in the stroma (aqueous fluid surrounding the stacks of thylakoids) and the cytoplasm.