Question

Photolysis of water takes place in
A.Calvin cycle
B.Glycolysis
C.Light phase
D.Dark phase

Answer 1

Photolysis of water takes place in plants, this process is necessary for plants to release oxygen from the water they absorb. The process of photolysis takes place with the help of sunlight and it occurs in the grana of the chloroplast.

Complete answer:
Photolysis of water takes place in the light phase. Light phase is a part of photosynthesis during which oxygen is released.
Photolysis of water is a process that breaks down the hydrogen and oxygen of water molecules which reside in the plants. As the name suggests this process occurs in the presence of sunlight, and this process occurs in the grana of the chloroplast.
Light phase is the first phase of photosynthesis, in this process complexes made up of chlorophylls and proteins absorb the light and break down the water molecule. The oxygen that is separated from the water molecules is considered as a waste for the plant, thus the plant releases the oxygen out in the atmosphere.
The oxygen released by the plant is essential for living beings for respiration. Thus, this whole process of photolysis of water takes place during the light phase of photosynthesis.
Thus option C is the correct answer.

Note:
During the light phase of photosynthesis, light energy is converted into chemical energy. This process only occurs during the presence of high light, it cannot occur during dark. Thus, this phase is called the light phase of photosynthesis. The light required for the plant to absorb during the light phase can be either natural or artificial.