Question

In photosynthesis, carbon dioxide is converted to carbohydrates. It is a ......................... process

• A. Reductive.
• B. Oxidative.
• C. Catabolic and exergonic.
• D. Reductive, anabolic and endergonic.

Answer 1

Answer: (D)

Reductive, anabolic and endergonic.

Photosynthesis is the process by which the green plants fixes the carbon dioxide to the complex compounds like glucose in presence of light. It involves synthesis of glucose from carbon dioxide and water so it is known as anabolic process. It involves oxidation of water which releases electrons. The electrons released during photolysis are picked up by a carrier molecule called nicotinamide adenine dinucleotide phosphate (NADP), changing it from its oxidized state to its reduced state. It is an endergonic process as it absorbs the photochemical energy from sunlight to synthesize complex glucose molecules.