Anti Bodies – Section 1

1. Which of those immunoglobulin classes is mainly found in external secretions?

A. Ig A
B. Ig D
C. Ig M
D. IgE

Correct Answer: A. Ig A

2. Cleavage of an IgG molecule by a specific protease can produce

A. an antigen-binding site and two constant regions
B. two heavy chain-light chain dimers
C. an inactive mixture of oligopeptides
D. two Fab fragments and one Fc fragment

Correct Answer: D. two Fab fragments and one Fc fragment

3. Papain digest IgG into

A. two Fab fragments and one Fc fragment
B. three Fab fragments and two Fc fragments
C. two Fab fragments and two Fc fragments
D. three Fab fragments and three Fc fragments

Correct Answer: A. two Fab fragments and one Fc fragment

4. Antibodies can be used

A. for the localization of proteins in the cell
B. for protein purification
C. to catalyze chemical reactions
D. all of the above

Correct Answer: D. all of the above

5. Type A blood

A. can be used to donate to type AB individuals
B. can be used to donate to type B individuals
C. contains type B antigens on the surface of red blood cells
D. can always be used to donate to an Rh+ individual

Correct Answer: A. can be used to donate to type AB individuals

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