Question

The following events occur during the process of photosynthesis. Choose the option that indicates the correct events.

1. Oxidation of carbon dioxide to carbohydrates.
2. Conversion of light energy into chemical energy.
3. Absorption of light energy by chlorophyll.
4. Conversion of hydrogen and oxygen into water.

Options

• (i) and (ii)

• (ii) and (iii)

• (iii) and (iv)

• (i) and (iv)

Answer 1

(ii) and (iii)

Explanation:

Photosynthesis begins when chlorophyll absorbs light energy (iii), which is then converted into chemical energy (ii) to power the plant. During this process, water is split into hydrogen and oxygen, and carbon dioxide is reduced (not oxidised) to form carbohydrates like glucose.