Chapter No 2 :BiologIcal Molecules (126 MCQ`S)

  1. The bond maintaining the linear sequence of amino acids in a polypeptide chain is:
    1. Peptide bond
    2. Disulphide bridges
    3. Hydrogen bond
    4. Ionic interaction
    5. Show Answer
      Answer: A
      Explanation:
      • N/A
  2. Two polypeptide chains of insulin protein are held together by which bonds?
    1. Disulphide
    2. Hydrophobic
    3. Hydrogen
    4. Ionic
    5. Show Answer
      Answer: A
      Explanation:
      • N/A
  3. Secondary structure of protein is formed by coiling and folding of polypeptide chain by which of the following bond?
    1. Disulphide
    2. Hydrophobic
    3. Hydrogen
    4. Ionic
    5. Show Answer
      Answer: B
      Explanation:
      • N/A
  4. Which of the following bonds are present in the tertiary structure of proteins?
    1. Disulphide& ionic bonds
    2. Hydrophobic
    3. Hydrogen & peptide bonds
    4. both A &C
    5. Show Answer
      Answer: D
      Explanation:
      • N/A
  5. Most important structure in globular proteins is:
    1. Primary structure
    2. Secondary structure
    3. Tertiary structure
    4. Quaternary structure
    5. Show Answer
      Answer: C
      Explanation:
      • N/A
  6. Pick out the fibrous protein from the following:
    1. Insulin
    2. Hemoglobin
    3. Actin
    4. Myosin
    5. Show Answer
      Answer: D
      Explanation:
      • N/A
  7. Change in pH of the medium can disrupt the function of which of the protein readily?
    1. Pepsin
    2. Collagen
    3. Keratin
    4. Silk
    5. Show Answer
      Answer: A
      Explanation:
      • N/A
  8. In sickle cell hemoglobin one amino acid is changed in:
    1. One alpha chain
    2. Both alpha chains
    3. One beta chain
    4. Both beta chains
    5. Show Answer
      Answer: D
      Explanation:
      • N/A
  9. In sickle cell hemoglobin, the change of single nucleotide results in change of amino acid in beta chain at:
    1. 1st position
    2. 2nd position
    3. 5th position
    4. 6th position
    5. Show Answer
      Answer: D
      Explanation:
      • N/A
  10. The shape which the protein molecule assumes when its polypeptide chain folds into its final compact form is called protein’s:
    1. Structure
    2. Primary structure
    3. Secondary structure
    4. Tertiary structure
    5. Show Answer
      Answer: A
      Explanation:
      • N/A

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