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MCQs

Total Questions : 76 | Page 8 of 8 pages
Question 71. Cyclins are proteins that
  1.    regulate passage from one stage of cell division to another
  2.    regulate apoptosis of damaged cells
  3.    None of these
  4.    regulate ability of cells to invade tissue
 Discuss Question
Answer: Option A. -> regulate passage from one stage of cell division to another
Question 72. Marfan's syndrome is thought to be a mutation affecting
  1.    collagen synthesis
  2.    insufficient thyroid production
  3.    hemoglobin synthesis
  4.    metabolism of homogentisic acid
 Discuss Question
Answer: Option A. -> collagen synthesis
Question 73. Sickle cell disease is due to
  1.    infection with a parasite
  2.    a mutation in the beta chain of Hb
  3.    a mutation in the alpha chain of Hb
  4.    None of these
 Discuss Question
Answer: Option B. -> a mutation in the beta chain of Hb
Question 74. Protein folding is
  1.    mediated by the ribosomes
  2.    mediated by other proteins called chaperones
  3.    automatic, mediated by the protein itself
  4.    None of these
 Discuss Question
Answer: Option B. -> mediated by other proteins called chaperones
Question 75. Over 50% of common cancers are associated with damage to a protein, p53. This protein
  1.    regulates apoptosis
  2.    is an oncogene
  3.    is a tumor supressor
  4.    is a cyclin
 Discuss Question
Answer: Option C. -> is a tumor supressor
Question 76. The four subunits of the hemoglobin (Hb) gene represent protein's
  1.    secondary structure
  2.    primary structure
  3.    tertiary structure
  4.    quaternary structure
 Discuss Question
Answer: Option D. -> quaternary structure

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