Question

What are the two stages in photosynthesis ?

Answer 1

Explanation:

The two stages of photosynthesis: Photosynthesis takes place in two stages: light-dependent reactions and the Calvin cycle (light-independent reactions). Light-dependent reactions, which take place in the thylakoid membrane, use light energy to make ATP and NADPH.

Answer 2

Answer:

The two stages of photosynthesis are :-

1. light-dependent reactions

2. light-independent reactions (Calvin cycle)

Explanation

• Light phase or light reaction - It occurs in grana in the presence of light only light is directly used in it.

1.Light phase occurs in two sub phases

1) Photoexcitation of chlorophyll molecule.

2) Photolysis of water

• 2.Dark reaction also known as light supported reaction as it is driven by the product of light reaction. Some enzyme of dark reaction like RUBP Carboxylase is activated by the presence of light.

• It is thermosensitive enzymatic reaction which occurs in stroma.

• In dark phase assimilation occurs which was traced out by different scientist and named as Calvin cycle / Hatch and slac.k cycle / CAM cycle.c