Question

Does photosynthesis in plants occur only in the day as their are two parts of photosynthesis :light reaction which occurs in the presence of light and dark reaction in which light is not necessary ?

Answer 1

Photosynthesis and cell respiration are two separate biochemical processes that function in different ways.

Photosynthesis can occur during the night, but requires light for the process to begin. The light independent portion of the cycle is called the dark reaction/ Calvin cycle and is a continuation of photosynthesis from light dependent stages. The dark reaction is not a separate cycle, but a continuation of photosynthesis and is independent of the presence of light.