Vitamins and Coenzymes problems
- 1. The symptoms of retinol excess are
Options- A. bone fragility
- B. nausea
- C. weakness
- D. all of these Discuss
Correct Answer: all of these
- 2. Which of these hormones is a catecholamine?
Options- A. Follitropin
- B. Norepinephrine
- C. Tetraiodothyronine
- D. Tetrahydrofolate Discuss
Correct Answer: Norepinephrine
- 3. The vitamin niacin is part of the __________ molecule.
Options- A. ferredoxin
- B. pyridoxal phosphate
- C. pyrophosphate
- D. NAD+ Discuss
Correct Answer: NAD+
- 4. Vitamins are essential because the organism
Options- 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 Discuss
Correct Answer: can't synthesize these compounds at all
- 5. ?-carotene together with ?-carotene, ?-carotene and cryptoxanthine are synthesized by
Options- A. plants
- B. animal
- C. plants and animals both
- D. none of these Discuss
Correct Answer: plants
- 6. Selenium is an essential component of the enzyme glutathione peroxidase which
Options- A. scavenges toxic hydoperoxycompounds in tissues
- B. reduces toxic hydoperoxycompounds in tissues
- C. oxidizes toxic hydoperoxycompounds in tissues
- D. none of the above Discuss
Correct Answer: scavenges toxic hydoperoxycompounds in tissues
- 7. In the co-enzyme B12the position occupied by a cyanide ion in vitamin B12 is bonded directly to the __________ of the ribose of adenosine.
Options- A. adenine
- B. 5-6 dimethylbenzimidazole
- C. hydroxycobalamin
- D. cyanocobalamin Discuss
Correct Answer: adenine
- 8. Acyl carrier protein (ACP) plays an important role in the biosynthesis of
Options- A. fatty acids
- B. amino acids
- C. sugars
- D. carbohydrates Discuss
Correct Answer: fatty acids
- 9. E.coli ACP has its molecular weight as around
Options- A. 9000
- B. 19000
- C. 39000
- D. 90,000 Discuss
Correct Answer: 9000
- 10. Vitamin-D deficiency can cause
Options- A. rickets
- B. pernicious anemia
- C. cataract
- D. beri-beri Discuss
Correct Answer: rickets
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