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MCQs

Total Questions : 51 | Page 3 of 6 pages
Question 21. Structures of anti-PCP antibody shows that the tight binding of PCP to the antibody is primarily due to
  1.    hydrophobic forces
  2.    electrostatic forces.
  3.    Van der Waals forces.
  4.    none of these
 Discuss Question
Answer: Option A. -> hydrophobic forces
Question 22. Antigenic determinants bind to which portions of an antibody?
  1.    Variable regions
  2.    Only light chains
  3.    Only heavy chains
  4.    Constant regions
 Discuss Question
Answer: Option A. -> Variable regions
Question 23. The humoral immune response relies on the production of soluble proteins called
  1.    antibodies
  2.    none of these
  3.    lymphocytes
  4.    macromolecules
 Discuss Question
Answer: Option A. -> antibodies
Question 24. The human IgG class of antibodies is divided into
  1.    five IgG classes
  2.    three IgG classes
  3.    two IgG classes
  4.    four IgG classes
 Discuss Question
Answer: Option D. -> four IgG classes
Question 25.  Which of those immunoglobulin classes is mainly found in external secretions?
  1.    Ig A
  2.    Ig D
  3.    Ig M
  4.    IgE
 Discuss Question
Answer: Option A. -> Ig A
Question 26.  Papain digest IgG into
  1.    two Fab fragments and one Fc fragment
  2.    three Fab fragments and two Fc fragments
  3.    two Fab fragments and two Fc fragments
  4.    three Fab fragments and three Fc fragments
 Discuss Question
Answer: Option A. -> two Fab fragments and one Fc fragment
Question 27.  Cleavage of an IgG molecule by a specific protease can produce
  1.    an antigen-binding site and two constant regions
  2.    two heavy chain-light chain dimers
  3.    an inactive mixture of oligopeptides
  4.    two Fab fragments and one Fc fragment
 Discuss Question
Answer: Option D. -> two Fab fragments and one Fc fragment
Question 28.  Antibodies can be used
  1.    for the localization of proteins in the cell
  2.    for protein purification
  3.    to catalyze chemical reactions
  4.    all of the above
 Discuss Question
Answer: Option D. -> all of the above
Question 29.  Type A blood
  1.    can be used to donate to type AB individuals
  2.    can be used to donate to type B individuals
  3.    contains type B antigens on the surface of red blood cells
  4.    can always be used to donate to an Rh+ individual
 Discuss Question
Answer: Option A. -> can be used to donate to type AB individuals
Question 30.  Which of the following are responsible for immune specificity?
  1.    Antigens
  2.    Antibodies
  3.    T lymphocytes
  4.    Macrophage
 Discuss Question
Answer: Option B. -> Antibodies

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