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MCQs

Total Questions : 93 | Page 8 of 10 pages
Question 71. . The vitamin riboflavin is part of the __________ molecule.
  1.    ferredoxin
  2.    FAD
  3.    pyridoxal phosphat
  4.    pyrophosphate
 Discuss Question
Answer: Option B. -> FAD
Question 72. . Which of these hormones is a catecholamine?
  1.    Follitropin
  2.    Norepinephrine
  3.    Tetraiodothyronine
  4.    Tetrahydrofolate
 Discuss Question
Answer: Option B. -> Norepinephrine
Question 73. . Biotin occurs mainly in combined forms bound to protein through
  1.    ε-N-lysine moiety
  2.    ε-S-lysine moiety
  3.    ε-N-biotinyl-L-lysine
  4.    ε-N-lipoyl - L-lysine
 Discuss Question
Answer: Option A. -> ε-N-lysine moiety
Question 74. .  Lipoic acid is a co-factor of the
  1.    pyruvic dehydrogenase
  2.    α-ketoglutaric dehydrogenase
  3.    both (a) and (b)
  4.    di-hydroorotate dehydrogenase
 Discuss Question
Answer: Option C. -> both (a) and (b)
Question 75. . β-carotene together with α-carotene, γ-carotene and cryptoxanthine are synthesized by
  1.    plants
  2.    animal
  3.    plants and animals both
  4.    none of these
 Discuss Question
Answer: Option A. -> plants
Question 76. . A deficiency of Vitamin K results in a decreased level of
  1.    prothrombin
  2.    thrombin
  3.    fibrin
  4.    fibrinogen
 Discuss Question
Answer: Option A. -> prothrombin
Question 77. . Which of the following compounds/(s) belong/(s) to the vitamin B6 group?
  1.    Pyridoxal
  2.    Pyridoxine
  3.    Pyridoxamine
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 78. . The vitamin riboflavin, which occurs as a yellow pigment in egg yolk and milk become
  1.    colorless on reduction with Zn in acid and regained its color on re-oxidation
  2.    colorless on oxidation and regained its color on reduction with Zn in acid
  3.    more deep in color on reduction with Zn in acid and regained its color on re-oxidation
  4.    more deep in color on oxidation and regained its color on reduction with Zn in acid
 Discuss Question
Answer: Option A. -> colorless on reduction with Zn in acid and regained its color on re-oxidation
Question 79. . What metal ion is specifically bound by vitamin B12?
  1.    Cobalt
  2.    Copper
  3.    Zinc
  4.    Iron
 Discuss Question
Answer: Option A. -> Cobalt
Question 80. . Vitamin-D deficiency can cause
  1.    rickets
  2.    pernicious anemia
  3.    cataract
  4.    beri-beri
 Discuss Question
Answer: Option A. -> rickets

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