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MCQs

Total Questions : 193 | Page 15 of 20 pages
Question 141. 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
Answer: (a).stabilize the semiquinone
Question 142. 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
Answer: (a).scavenges toxic hydoperoxycompounds in tissues
Question 143. 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
Answer: (d).both ends by two disulfide bonds
Question 144. 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
Answer: (c).Albert Szent-Gyorgyi
Question 145. A deficiency of niacin causes
  1.    pellagra
  2.    scurvy
  3.    cataract
  4.    anemia
 Discuss Question
Answer: Option A. -> pellagra
Answer: (a).pellagra
Question 146. An early sign of retinol deficiencies in man is
  1.    night blindness
  2.    keratinization
  3.    xeropthalmia
  4.    none of these
 Discuss Question
Answer: Option A. -> night blindness
Answer: (a).night blindness
Question 147. What compound of raw egg white causes a syndrome similar to vitamin B deficiency?
  1.    Avidin
  2.    Betabindin
  3.    Ovalbumin
  4.    Albumin
 Discuss Question
Answer: Option A. -> Avidin
Answer: (a).Avidin
Question 148. An enzyme, L-folate reductase reduces folic acid to
  1.    hydrofolic acid
  2.    dihydrofolic acid
  3.    trihydrofolic acid
  4.    tetrahydrofolic acid
 Discuss Question
Answer: Option B. -> dihydrofolic acid
Answer: (b).dihydrofolic acid
Question 149. The disease Beriberi is due to a dietary deficiency in
  1.    vitamin B1 (thiamine)
  2.    vitamin B2 (riboflavin)
  3.    vitamin B6 (pyridoxine)
  4.    vitamin B12
 Discuss Question
Answer: Option A. -> vitamin B1 (thiamine)
Answer: (a).vitamin B1 (thiamine)
Question 150. Which of these is a symptom of vitamin A deficiency?
  1.    Osteoporosis
  2.    Impaired taste perception
  3.    Blindness
  4.    Impaired blood clotting
 Discuss Question
Answer: Option C. -> Blindness
Answer: (c).Blindness

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