7. In metabolism, food gets oxidized and the coenzymes NAD + and FAD are reduced

Question

7. In metabolism, food gets oxidized and the coenzymes NAD+ and FAD are reduced.

8. Which of the following does not undergo oxidation or reduction during metabolism?

A. lipids

B. Coenzyme A

C. carbohydrates

D. FAD

9. Which of the following is not a coenzyme?

A. NAD+

B. Coenzyme A

C. ATP

D. FAD

10. Which of the following is false regarding FAD?

A. FAD is an oxidizing agent.

B. FAD is the oxidized form.

C. FAD is a coenzyme

D. FADH2 is an oxidizing agent.

11. How many carbon atoms are present in an acetyl group?

A. 1

B. 2

C. 3

D. 4

12. The purpose of coenzyme A is to deliver acetyl groups to the citric acid cycle.

13. What reacts with NADH and FADH2 to form NAD+ and FAD?

A. carbon dioxide

B. water

C. ATP

D. oxygen (and H+)

14. Which metabolic process oxidizes NADH and FADH2

A. electron transport chain

B. oxidative phosphorylation

C. citric acid cycle

D. hydrolysis

15. Which metabolic process converts ADP to ATP?

A. electron transport chain

B. oxidative phosphorylation

C. citric acid cycle

D. hydrolysis

Explanation / Answer

7)

Yes, the statement given is true.

In metabolism, food gets oxidized and the coenzymes NAD+ and FAD are reduced. oxidation is loss of electrons and reduction is gain of electrons.

8)

CoenzymeA does not undergo oxidation or reduction during metabolism.

9)

ATP is a not a coenzyme.

A coenzyme is a necessary protein to make an enzyme active and able to operate. ATP is a high energy molecule and provides the energy for a reaction to occur.

10)

False statement is FADH2 is an oxidizing agent. FADH2 is a reducing agent.

11)

Acetyl group is CH3CO. So the number of carbon atoms present in acetyl group is 2.

12)

Yes, the statement is true. The purpose of coenzyme A is to deliver acetyl groups to the citric acid cycle.

13)

ATP reacts with NADH and FADH2 to form NAD+ and FAD.

14)

The metabolic process that oxidizes NADH and FADH2 is electron transport chain.

15)

The metabolic process that converts ADP to ATP is oxidative phosphoryllation.

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