Question

Differentiate between- light reaction and dark reaction (Site of occurrence).

Answer 1

Light reaction:

This reaction occurs in the presence of light in the thylakoids.

Dark reaction:

This reaction occurs in the absence of light in the stroma.

Light reaction	Dark reaction
1. This phase of photosynthesis takes place in the presence of light.	1. This phase of photosynthesis takes place in the absence of light.
2. The process occurs in thylakoids.	2. This reaction occurs in the stroma.
3. It is called the photochemical phase.	3. It is called the biosynthetic phase.
4. The first stage is a light reaction, where the chlorophyll captures solar energy and produces ATP and NADPH.	4. The second phase of photosynthesis produces glucose by utilizing energy produced in the first phase.