Q. Why is energy required by an organism even during sleep ? Q. Give the energy transformation that takes place in the process of photosynthesis.
Q. What is chlorophyll ?
Q. Name the various factor which affect the rate of photosynthesis.
Q. Define photolysis.​

Energy is required during sleep also because some parts of our body even work while we sleep. During the sleep, our body also carries metabolic activities which need energy. In that time respiration digestion occurs when we are sleeping that need energy.

[1] This is because even when an organism is asleep, various biological processes keep on occurring in its body which requires energy.

[2] Solar energy is converted into chemical energy during photosynthesis.

[3] Green pigments present in leaves.

[4] The factors which affect the rate of photosynthesis are light, water, temperature and carbon dioxide.

[5] It is the breakdown of water molecules into H+ and OH- ions by the light activated chlorophyll during the light reaction.