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Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892

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BuyFindarrow_forward

Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892
Textbook Problem

One characteristic of a B cell is that it:

a. has the same structure in both invertebrates and vertebrates.

b. recognizes antigens held on class I major histocompatibilitycomplex proteins.

c. binds virus-infected cells and kills them directly.

d. makes many different B-cell receptors on its surface.

e. has a B-cell receptor on its surface, which is the IgM molecule.

Summary Introduction

Introduction:

B cells are a kind of white blood cells, which play an important role in the humoral immune response of the adaptive immunity by releasing the antibodies. B lymphocytes differentiate into two types of cells, which are the plasma B cells and the memory B cells.

Explanation

Justification for the correct answer:

Option (e) states that B cell has a B-cell receptor on its surface, which is the IgM molecule. This is a true statement as the B-cell receptor present on the surface of B cells is IgM, which is the primary kind of antibodies secreted in case of antibody mediated response. Hence, option (e) is correct.

Justification for the incorrect answers:

Option (a) states that B cell has same structure in both invertebrates and vertebrates. This is false as invertebrates do not have an adaptive immune response, yet they have only innate immune response, and B cells are a part of adaptive immunity. So, it is an incorrect option...

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