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Home ‣ Biochemistry ‣ Vitamins and Coenzymes Comments
  • Question

  • Which of the following compounds/(s) belong/(s) to the vitamin B6 group?


  • Options
  • A. Pyridoxal
  • B. Pyridoxine
  • C. Pyridoxamine
  • D. All of these

  • Correct Answer
  • All of these 

    • Vitamins and Coenzymes problems

    Search Results

    • 1. Vitamin B12 is useful in the prevention and treatment of

    • Options
    • A. pernicious anemia
    • B. scurvy
    • C. cataract
    • D. beri-beri
      • Discuss
    • 2. The occurrence of metals such as iron or molybdenum in some flavoproteins can

    • Options
    • A. stabilize the semiquinone
    • B. de-stabilize the semiquinone
    • C. form chelation
    • D. all of these
      • Discuss
    • 3. The disease Beriberi is due to a dietary deficiency in

    • Options
    • A. vitamin B1 (thiamine)
    • B. vitamin B2 (riboflavin)
    • C. vitamin B6 (pyridoxine)
    • D. vitamin B12
      • Discuss
    • 4. A fat-soluble vitamin that regulates blood clotting is

    • Options
    • A. vitamin A
    • B. vitamin K
    • C. vitamin C
    • D. niacin
      • Discuss
    • 5. The absence of ascorbic acid in the human diet gives rise to

    • Options
    • A. rickets
    • B. pernicious anemia
    • C. cataract
    • D. beri-beri
      • Discuss
    • 6. A deficiency of thiamin produces the disease known as

    • Options
    • A. beri-beri
    • B. scurvy
    • C. cataract
    • D. anemia
      • Discuss
    • 7. Which of the following are reduced coenzymes?

    • Options
    • A. NADH and FADH2
    • B. NAD+ and FAD
    • C. ATP and GTP
    • D. Coenzyme A and ubiquinone
      • Discuss
    • 8. Vitamin K1 was first isolated from alfalalfa and has the phytyl side chain consisting of

    • Options
    • A. four isoprene units
    • B. six isoprene units
    • C. nine isoprene units
    • D. four isoprene units
      • Discuss
    • 9. Biotin occurs mainly in combined forms bound to protein through

    • Options
    • A. ?-N-lysine moiety
    • B. ?-S-lysine moiety
    • C. ?-N-biotinyl-L-lysine
    • D. ?-N-lipoyl - L-lysine
      • Discuss
    • 10. An early sign of retinol deficiencies in man is

    • Options
    • A. night blindness
    • B. keratinization
    • C. xeropthalmia
    • D. none of these
      • Discuss

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