MICROBIOLOGY:SYS.APPR.-ACCESS >CUSTOM<
MICROBIOLOGY:SYS.APPR.-ACCESS >CUSTOM<
5th Edition
ISBN: 9781260242973
Author: Cowan
Publisher: MCG CUSTOM
bartleby

Concept explainers

bartleby

Videos

Textbook Question
Book Icon
Chapter 15, Problem 1MCQ

The primary B-cell receptor is

  1. a. IgD.
  2. b. IgA.
  3. c. IgE.
  4. d. IgG.
Expert Solution & Answer
Check Mark
Summary Introduction

Introduction:

Immunoglobulins are the glycoprotein molecules which are present in a Y shaped structure. They bind to the antigenic foreign epitopes and inhibit the spread of infection inside the human body. They are composed of one heavy chain and one light chain with variable and constant regions in the polypeptide protein.

Answer to Problem 1MCQ

Correct answer:

The primary B-cell receptor is IgD. Therefore, option (a) is correct.

Option (a) is given as “IgD”.

Explanation of Solution

Justify reason for the correct statement:

In the case of B lymphocytes, the genes code for Ig (immunoglobulins) synthesis, which are the receptors for B-cells. There are antigen binding sites in the ends of forks that are formed by the heavy and light chains and are variable in shape with respect to the shape of antigens. IgDis one of the classes of Igs that is secreted in blood and is present as a part of the membrane surface receptor molecule on B cells.

Hence, option (a) is correct.

Justify reasons for the incorrect statements:

Option (b) is given as “IgA”.

IgA is secreted in the lactating milk and forms the defense immunity in a child. It is not the primary Ig of B-cell receptors. Hence, it is a wrong answer.

Option (c) is given as “IgE”.

IgE is released from the mast cells following an antigenic response in the human body. It is not the primary Ig of B-cell receptors. Hence, it is a wrong answer.

Option (d) is given as “IgG”.

IgG is the antibody which is formed from activated B cells and circulates in the blood and body fluids. It is not the primary Ig of B-cell receptors. Hence, it is a wrong answer.

Hence, options (b),(c), and(d) are incorrect.

Conclusion

IgD is the immunoglobulin class that is considered as the primaryreceptor of B-cell.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
Which statement describes a limitation of T-cell receptors (TCRs) compared to B-cell receptors (BCRs)? A.) only BCRs can interact with epitopes on free antigens or epitopes            B.) displayed directly on the pathogen C.) only BCRs can initiate a pathogen-specific immune response D.) only BCRs recognize pathogen epitopes
Immunoglobins help eliminate the pathogen through the process of: A. Release of hydrolytic enzymes on the pathogen B. Agglutination and precipitation C. Direct phagocytosis D. Activating platelets
What is the first step in the antigen-antibody interaction? A.) opsonization B.) epitope production C.) neutralization D.) agglutination

Chapter 15 Solutions

MICROBIOLOGY:SYS.APPR.-ACCESS >CUSTOM<

Ch. 15.3 - List characteristics of antigens that optimize...Ch. 15.3 - Prob. 12AYPCh. 15.3 - List the types of cells that can act as...Ch. 15.4 - Prob. 14AYPCh. 15.4 - Diagram the steps of B-cell activation, and list...Ch. 15.5 - Prob. 16AYPCh. 15.5 - Explain the role of cytotoxic T cells in...Ch. 15.6 - Diagram an antibody binding antigen, and list the...Ch. 15.6 - List the five types of antibodies and important...Ch. 15.6 - Draw and label a graph illustrating the...Ch. 15.7 - Prob. 21AYPCh. 15.7 - Discuss the qualities of an effective vaccine.Ch. 15.7 - List several types of vaccines, and discuss how...Ch. 15.7 - Explain the principle of herd immunity and the...Ch. 15 - The primary B-cell receptor is a. IgD. b. IgA. c....Ch. 15 - In humans. B cells mature in the _________, and T...Ch. 15 - Small, simple molecules are ________ antigens. a....Ch. 15 - The cross-linkage of antigens by antibodies is...Ch. 15 - T cells assist in the functions of certain B cells...Ch. 15 - TC cells are important in controlling a. virus...Ch. 15 - Which of the following can serve as...Ch. 15 - A vaccine that contains parts of viruses is called...Ch. 15 - Conjugated vaccines combine antigens and a....Ch. 15 - Widespread immunity that protects the population...Ch. 15 - Cell surface markers are also often called...Ch. 15 - Antibodies are secreted by monocytes.Ch. 15 - Vaccination could be described as artificial...Ch. 15 - IgE antibodies are found in body secretions.Ch. 15 - Prob. 15TFCh. 15 - Explain the two main features that characterize...Ch. 15 - Prob. 2CTQCh. 15 - Prob. 3CTQCh. 15 - Provide an explanation to refute the following...Ch. 15 - a. Explain how the anamnestic response is...Ch. 15 - Prob. 1VCCh. 15 - Using the words that follow, please create a...
Knowledge Booster
Background pattern image
Biology
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Biology
ISBN:9781305967359
Author:STARR
Publisher:CENGAGE L
7 Freudian Defence Mechanisms Explained; Author: Lewis Psychology;https://www.youtube.com/watch?v=fTnjJ105ze4;License: Standard youtube license