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MCQs

Total Questions : 301 | Page 2 of 31 pages
Question 11. Sickle cell disease is due to
  1.    a mutation in the beta chain of Hb
  2.    a mutation in the alpha chain of Hb
  3.    infection with a parasite
  4.    none of the above
 Discuss Question
Answer: Option A. -> a mutation in the beta chain of Hb
Answer: (a).a mutation in the beta chain of Hb
Question 12. The oxygen binding curves of hemoglobin and myoglobin
  1.    allow maximum transfer of oxygen to the tissues
  2.    are a consequence of the quaternary structure of hemoglobin
  3.    both (a) and (b)
  4.    are identical
 Discuss Question
Answer: Option C. -> both (a) and (b)
Answer: (c).both (a) and (b)
Question 13. Which of the following statements is incorrect?
  1.    Protein G contains both a-helix and P-sheet
  2.    Protein G contains only a-helix
  3.    Fatty acid binding protein contains largely P-sheet
  4.    Hemoglobin contains four sub-units
 Discuss Question
Answer: Option B. -> Protein G contains only a-helix
Answer: (b).Protein G contains only a-helix
Question 14. The nature of peptide bond can be best explained as
  1.    partial double bond
  2.    truly double bond
  3.    Hydrogen bond
  4.    Van der waals force
 Discuss Question
Answer: Option A. -> partial double bond
Answer: (a).partial double bond
Question 15. Which of the following statement is incorrect?
  1.    Hemoglobin and myoglobin are the two oxygen binding proteins
  2.    Hemoglobin transports O₂ in the blood
  3.    Myoglobin stores O₂ in muscles
  4.    None of the above
 Discuss Question
Answer: Option D. -> None of the above
Answer: (d).None of the above
Question 16. The major element of secondary structure in myoglobin and hemoglobin is
  1.    the P-strand
  2.    the a-helix
  3.    the reverse turn
  4.    All of these
 Discuss Question
Answer: Option B. -> the a-helix
Answer: (b).the a-helix
Question 17. Which of the following is an example of tertiary structure in a protein?
  1.    A multimeric protein
  2.    An a-helix
  3.    A P-pleated sheet
  4.    A globular domain
 Discuss Question
Answer: Option D. -> A globular domain
Answer: (d).A globular domain
Question 18. The peptide bond in proteins is
  1.    only found between proline residues
  2.    usually cis unless proline is the next amino acid
  3.    usually trans unless proline is the next amino acid
  4.    is planar because of steric hinderance
 Discuss Question
Answer: Option C. -> usually trans unless proline is the next amino acid
Answer: (c).usually trans unless proline is the next amino acid
Question 19. The molecular formula for glycine is C₂H₅O₂N. What would be the molecular formula for a linear oligomer made by linking ten glycine molecules together by condensation synthesis?
  1.    C₂₀H₅₀O₂₀N₁₀
  2.    C₂₀H₃₂O₁₁N₁₀
  3.    C₂₀H₄₀O₁₀N₁₀
  4.    C₂₀H₆₈O₂₉N₁₀
 Discuss Question
Answer: Option B. -> C₂₀H₃₂O₁₁N₁₀
Answer: (b).C₂₀H₃₂O₁₁N₁₀
Question 20. Hydrogen bonds in a-helices are
  1.    more numerous than Vander Waals interactions
  2.    not present at Phe residues
  3.    analogous to the steps in a spiral staircase
  4.    roughly parallel to the helix axis
 Discuss Question
Answer: Option D. -> roughly parallel to the helix axis
Answer: (d).roughly parallel to the helix axis

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