Question

two stages of photosynthesis​

Answer 1

Answer:

light reaction

carbon fixation

Explanation:

Stages of photosynthesis

Stage one: light reactions

This stage is so-called because it depends on light being available. The reactions of this stage also require specific enzymes to catalyse them.

Light energy absorbed by chlorophyll is converted into chemical energy. Some of this energy is used to split water into hydrogen and oxygen.

Some of the chemical energy is used to make ATP from ADP and phosphate (Pi). This chemical energy is stored as ATP.

Stage two: carbon fixation

This stage also requires energy, which is supplied by the ATP made by the light reactions. The ATP is broken down to release energy which is used to combine hydrogen (from the light reactions) with carbon dioxide to produce sugar.

The reactions of carbon fixation are controlled by specific enzymes. The overall process of carbon fixation is summarised in the diagram below.

Answer 2

Explanation:

1. The light-dependent reactions;
2. The light-independent reactions, or Calvin Cycle.