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MCQs

Total Questions : 93 | Page 9 of 10 pages
Question 81. . A fat-soluble vitamin that regulates blood clotting is
  1.    vitamin A
  2.    vitamin K
  3.    vitamin C
  4.    niacin
 Discuss Question
Answer: Option B. -> vitamin K
Question 82. . Vitamin K1 was first isolated from alfalalfa and has the phytyl side chain consisting of
  1.    four isoprene units
  2.    six isoprene units
  3.    nine isoprene units
  4.    four isoprene units
 Discuss Question
Answer: Option A. -> four isoprene units
Question 83. . In one iron-metalloflavoprotein, the iron is present as a
  1.    heme-protein
  2.    nonheme type
  3.    both (a) and (b)
  4.    flavin moiety
 Discuss Question
Answer: Option A. -> heme-protein
Question 84. . The occurrence of metals such as iron or molybdenum in some flavoproteins can
  1.    stabilize the semiquinone
  2.    de-stabilize the semiquinone
  3.    form chelation
  4.    all of these
 Discuss Question
Answer: Option A. -> stabilize the semiquinone
Question 85. . Which of these molecules is vitamin H?
  1.    Biotin
  2.    Carnitine
  3.    Folic acid
  4.    None of these
 Discuss Question
Answer: Option A. -> Biotin
Question 86. . Which of these is a vitamin A precursor?
  1.    Cobalamin
  2.    Pyridoxine
  3.    Beta-Carotene
  4.    Thiamine
 Discuss Question
Answer: Option C. -> Beta-Carotene
Question 87. . Models of end-linked Osaka VI Fibrinogen dimers, a bilayer dimer is linked at
  1.    both ends by one disulfide bond
  2.    either end via two disulfide bonds
  3.    either end via a single disulfide bond
  4.    both ends by two disulfide bonds
 Discuss Question
Answer: Option D. -> both ends by two disulfide bonds
Question 88. . Selenium is an essential component of the enzyme glutathione peroxidase which
  1.    scavenges toxic hydoperoxycompounds in tissues
  2.    reduces toxic hydoperoxycompounds in tissues
  3.    oxidizes toxic hydoperoxycompounds in tissues
  4.    none of the above
 Discuss Question
Answer: Option A. -> scavenges toxic hydoperoxycompounds in tissues
Question 89. . A deficiency of niacin causes
  1.    pellagra
  2.    scurvy
  3.    cataract
  4.    anemia
 Discuss Question
Answer: Option A. -> pellagra
Question 90. . Who discovered vitamin C (ascorbic acid)?
  1.    Paul Berg
  2.    Linus Pauling
  3.    Albert Szent-Gyorgyi
  4.    Kerry Mull is
 Discuss Question
Answer: Option C. -> Albert Szent-Gyorgyi

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