Question

Question 7 3 pts Which of the following normally occurs after B cell encounter with its antigen? Select all correct answers. Antibody production Class switch recombination VIDJ recombination Junctional diversification Question 8 3 pts What type(s) of MHC molecules are present on antigen-presenting cells? Both MHC I and MHC II Neither MHC I nor MHC II MHC II only MHC I only

Answer 1

Question 7 answer:

Antibody production

Class switch recombination

Explanation:

Antibody production is main function of immune system and that is carried by B ell.Antibody is important part of immune respons, antibofy specifically recognize and binding to antigen.

After encounter antigen mature B cell bind with receptor and become activated. After that it proliferate and become a blasting B cell, which form germinal centre,this germinal centre B cell undergo class switch recombination.

So these two options are correct.

Question 8 answer:

MHC II only

Explanation:

Only MHC II present on surface of antigen presenting cell(APC). MHC II has fundamental role in presenting extracellular antigent to T cell.

Thus the correct answer is only MHC II presemt in antigen presenting cell.