Question

Light reaction and dark reaction of photosynthesis take place in ___ respectively.

• A. stroma and grana
• B. stroma and lamellae
• C. thylakoid and double membrane
• D. grana and stroma

Answer 1

The correct option is (C):

Explanation of correct option:

1. The light reaction of photosynthesis occurs in the presence of light which results in photolysis of water and it occurs in the grana of the chloroplast.
   
2. Photosystems are present in the grana which are involved in the light reaction.
   
3. ATP produced during light reaction is used up in the dark reaction of photosynthesis.
   
4. The dark phase does not require the activation of sunlight and it occurs in the stroma of the chloroplast.
   

Final Answer: Light reaction and dark reaction of photosynthesis take place in grana and stroma respectively.