Question

Photolysis of water takes place in

• A. Calvin cycle
• B. Glycolysis
• C. Light phase
• D. Dark phase

Answer 1

The correct option is C

Light phase

The correct option is C.

The explanation for the correct option:

1. Photolysis of water is a process that breaks the hydrogen and oxygen of water that remains in the plant.
2. This process takes place with the help of sunlight and it occurs in the grana of the chloroplast.
3. So, the Photolysis of water takes place in the light phase.

The explanation of the incorrect options:

Option A:

1. Calvin cycle is a light-dependent reaction.
2. It takes place in the stroma( the inner space of chloroplasts).
3. It occurs in the daytime and the conversion of carbon dioxide into glucose takes place through the Calvin cycle.

Option B :

1. Glycolysis is a metabolic pathway that converts glucose into pyruvic acid.
2. This process takes place in the cytoplasm of the cell.

Option D :

1. Dark phase reaction is a light independent process.
2. It occurs in stroma of chloroplast.
3. In this process sugar molecules are formed from carbon dioxide and water.

Final answer: Photolysis of water takes place in light phase.