Antibody – Section 1

11. Heat-labile class of immunoglobulins include

A. IgA
B. IgE
C. IgG
D. IgM

Correct Answer: B. IgE

12. Which of the following (s) is/are function (s) of Fc fragment of IgG?

A. It determines catabolic rate
B. It binds complement
C. It is related to passage of IgG across the placental barrier
D. All of these

Correct Answer: D. All of these

13. Which of the following is the phylogenetically oldest immunoglobulin?

A. IgE
B. IgM
C. IgG
D. All are similar

Correct Answer: B. IgM

14. The secretary component of sIgA is

A. made by plasma cells that secrete dimeric IgA
B. added to dimeric IgA by the M cell
C. formed by cleavage of an epithelial cell receptor used to transport the dimeric IgA across the epithelial cell
D. made by T cells

Correct Answer: C. formed by cleavage of an epithelial cell receptor used to transport the dimeric IgA across the epithelial cell

15. Anti-Rh antibodies are

A. IgG type
B. IgA type
C. IgE type
D. IgD type

Correct Answer: A. IgG type

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