Which immunoglobulin is found at the surface of B cells as well as free in the s

Question

Which immunoglobulin is found at the surface of B cells as well as free in the serum?

a. IgA

b. IgD

c. IgE

d. IgM

20. Which of the following statements which compare the effects of an attenuated vaccine to that of an inactivated vaccine is false?

a. Both allow the presentation of epitopes on MHCII.

b. The attenuated version, but not the inactivated one, allows presentation on MHCI.

c. The attenuated version would cause the activation of TH1 and TH2 lymphocytes, whereas the inactivated version would only cause the activation of TH2 lymphocytes.

d. Both would allow one to acquire a cell mediated immunity.

Explanation / Answer

1. IgD is the immunoglobin found on cell suface of B cells as well as free in serum. The B cells express only IgD and IgM. The plasma protein is composed of 1% of IgD of its composition.

2. The statement in option C is false. Both will result in activation of TH1 and TH2

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