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Vitamins and Coenzymes (Biochemistry) Question and Answers-Page first

Vitamins and Coenzymes problems


  • 1. The symptoms of retinol excess are

  • Options
  • A. bone fragility
  • B. nausea
  • C. weakness
  • D. all of these
  • Discuss
  • 2. Which of these hormones is a catecholamine?

  • Options
  • A. Follitropin
  • B. Norepinephrine
  • C. Tetraiodothyronine
  • D. Tetrahydrofolate
  • Discuss
  • 3. The vitamin niacin is part of the __________ molecule.

  • Options
  • A. ferredoxin
  • B. pyridoxal phosphate
  • C. pyrophosphate
  • D. NAD+
  • Discuss
  • 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
  • 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
  • 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
  • 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
  • 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
  • 9. E.coli ACP has its molecular weight as around

  • Options
  • A. 9000
  • B. 19000
  • C. 39000
  • D. 90,000
  • Discuss
  • 10. Vitamin-D deficiency can cause

  • Options
  • A. rickets
  • B. pernicious anemia
  • C. cataract
  • D. beri-beri
  • Discuss

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