Question

Write the differences between light and dark reactions of photosynthesis.

Answer 1

Light reaction	Dark reaction
1. It occurs in the grana of the chloroplast.	1. Occurs in the stroma of the chloroplast.
2. It occurs only in the presence of light.	2. It occurs in the presence or absence of light.
3. Light reaction absorbs oxygen andlight energy.	3. Dark reaction absorbs only CO2.
4. End products are O2 , ATP and NADPH.	4. End product is Glucose.
5. Photolysis of water occurs.	5. Carbon fixation occurs
6. First stage of photosynthesis.	6. Second stage of photosynthesis.