Question

How is glucose and starch produced in plants?

• A. By photolysis of water
• B. By absorption of sunlight
• C. By reduction of carbon dioxide
• D. By release of oxygen and absorption of carbon dioxide

Answer 1

The correct option is C

By reduction of carbon dioxide

Glucose or starch is produced by reduction of carbon-dioxide in plants during photosynthesis. Energy required for the reduction is derived from light reaction (which takes place by absorption of sunlight by chlorophyll and photolysis of water followed by synthesis of energy molecules like ATP or NADP).