Question

Assertion :A total of 10 $NAD{H}_2$ and 2$FAD{H}_2$ molecules are formed in aerobic respiration. Reason: $NAD{H}_2$ and 2 $FAD{H}_2$ help in the formation of 34 ATP molecules.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
• C. Assertion is correct but Reason is incorrect.
• D. Both Assertion and Reason are incorrect.

Answer 1

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

Aerobic respiration is the release of energy from glucose or another organic substrate in the presence of oxygen. Strictly speaking aerobic means in air, but it is the oxygen in the air which is necessary for aerobic respiration. A total of 10 NADH${}_2$ and 2FADH${}_2$ molecules are formed in aerobic respiration. We generally say that you get 3 ATPs per NADH and 2 per FADH${}_2$. So, all together 34 ATP molecules are formed in aerobic respiration. Thus, assertion and reason are correct. But, reason is not the correct explanation for assertion. Thus, option B is correct and other options are incorrect.