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Vitamins and Coenzymes problems

  • 1. A deficiency of Vitamin K results in a decreased level of

  • Options
  • A. prothrombin
  • B. thrombin
  • C. fibrin
  • D. fibrinogen
    • Discuss
  • 2. A deficiency of niacin causes

  • Options
  • A. pellagra
  • B. scurvy
  • C. cataract
  • D. anemia
    • Discuss
  • 3. Who discovered vitamin C (ascorbic acid)?

  • Options
  • A. Paul Berg
  • B. Linus Pauling
  • C. Albert Szent-Gyorgyi
  • D. Kerry Mull is
    • Discuss
  • 4. An example of a digestive hormone is

  • Options
  • A. lipase
  • B. pepsin
  • C. amylase
  • D. gastrin
    • Discuss
  • 5. Which of these molecules is vitamin H?

  • Options
  • A. Biotin
  • B. Carnitine
  • C. Folic acid
  • D. None of these
    • Discuss
  • 6. The vitamin riboflavin, which occurs as a yellow pigment in egg yolk and milk become

  • Options
  • A. colorless on reduction with Zn in acid and regained its color on re-oxidation
  • B. colorless on oxidation and regained its color on reduction with Zn in acid
  • C. more deep in color on reduction with Zn in acid and regained its color on re-oxidation
  • D. more deep in color on oxidation and regained its color on reduction with Zn in acid
    • Discuss
  • 7. Ascorbic acid acts as an

  • Options
  • A. reducing agent
  • B. oxidizing agent
  • C. oxidizing and reducing agent both
  • D. none of the above
    • Discuss
  • 8. In one iron-metalloflavoprotein, the iron is present as a

  • Options
  • A. heme-protein
  • B. nonheme type
  • C. both (a) and (b)
  • D. flavin moiety
    • Discuss
  • 9. What compound of raw egg white causes a syndrome similar to vitamin B deficiency?

  • Options
  • A. Avidin
  • B. Betabindin
  • C. Ovalbumin
  • D. Albumin
    • Discuss
  • 10. Vitamin B12 (Cobalamin) is only synthesized by

  • Options
  • A. fishes
  • B. micro-organisms
  • C. plants
  • D. animals
    • Discuss

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