Question

The sunlight is used during photosynthesis to:

• A. open the guard cells
• B. break down the cell wall
• C. break down the water molecules
• D. transport water and minerals in the plant

Answer 1

The correct option is C

break down the water molecules

Light energy is absorbed by chlorophyll, a green substance found in chloroplasts in some plant cells and algae. Absorbed light energy is used to convert carbon dioxide (from the air) and water (from the soil) into a carbohydrate compound. Oxygen is released as a by-product. The chemical reaction involved in the process of photosynthesis is given below:

$6C{O}_2+12H_{2}O\underset{chlorophyl}{\stackrel{sunlight}{\to }}{C}_6{H}_{12}{O}_6+6O_2+6H_{2}O$