Vitamins and Coenzymes – Section 1

6. Vitamin B12 (Cobalamin) is only synthesized by

A. fishes
B. micro-organisms
C. plants
D. animals

Correct Answer: B. micro-organisms

7. Which of the following are reduced coenzymes?

B. NAD+ and FAD
C. ATP and GTP
D. Coenzyme A and ubiquinone

Correct Answer: A. NADH and FADH2

8. The absence of ascorbic acid in the human diet gives rise to

A. rickets
B. pernicious anemia
C. cataract
D. beri-beri

Correct Answer: B. pernicious anemia

9. Vitamins are essential because the organism

A. can’t synthesize these compounds at all
B. can synthesize these compounds partially
C. can’t synthesize these compounds in the adequate amounts
D. none of the above

Correct Answer: A. can’t synthesize these compounds at all

10. The prosthetic group biotin is a carrier of which type of molecule?

A. Activated carbon dioxide (CO2)
B. Ammonia
C. Methyl group
D. Sulfhydryl group

Correct Answer: A. Activated carbon dioxide (CO2)

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