Question

Choose the correct option with respect to the sequence of events which occurs during photosynthesis.

1. Reduction of carbondioxide to carbohydrates.
2. Conversion of light energy to chemical energy.
3. Splitting of water molecule.

• A. 1 $\to$ 2 $\to$ 3
• B. 2 $\to$ 3 $\to$ 1
• C. 3 $\to$ 1 $\to$ 2
• D. 2 $\to$ 1 $\to$ 3

Answer 1

The correct option is B 2 $\to$ 3 $\to$ 1

$\Rightarrow$ Plants have a photosynthetic pigment called chlorophyll. This pigment absorbs the light energy coming from the sun and converts it into chemical energy and store it in the form of ATP.
$\Rightarrow$ In the next step photolysis of water takes place, i.e., water is broken down into it's components.
$\Rightarrow$ The energy and hydrogen produced in the first two steps respectively are utilised for the reduction of carbon dioxide to carbohydrate.