Question

Desctibe about two stages of photosynthesis

Answer 1

The two stages of photosynthesis are as follows :

A. Light reaction :
It occurs in the grana where photon are absorbed so as to excite electrons of chlorophyll to a higher energy level. These activated elctrons are harnessed to form ATP from ADP and reduce NADP to NADPH. Water is also splitted during this and oxygen is released.

B. Dark reaction :
Calvin cycle occurring in chlorophyll, here carbon-dioxide combine with a 5-carbon sugar called ribulose biphospahte. This unstable compounf breaks down into 3-carbon compound. This then form glucose.

Answer 2

Here is your answer : )

The two stages of photosynthesis are :- 1. Light dependent
2. Light independent

1. Light dependent :-
Requires light to take place.
It takes place in the thylakoids in the presence of light to make ATP and NADPH.
2. Light independent :-
It occurs with or without light.
It takes place in the stomach of chloroplast and carbon dioxide becomes sugar with ATP and NADPH.

Hope it helps you.