Which of the following is characteristic of antibodies? - ProProfs Discuss
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Which of the following is characteristic of antibodies?



A. Carbohydrate structure
B. Composed of heavy and light polypeptide chains
C. Three binding sites per antibody monomer
D. Incapable of being transferred from one person to another

This question is part of Immunology Study Questions
Asked by Lindali, Last updated: Oct 08, 2020

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3 Answers

O. Bickis

O. Bickis

Get immense pleasure in traveling and writing about visiting places.

O. Bickis
O. Bickis, Corporate employee, MBA, Stockton

Answered Mar 31, 2020

The correct answer is this question is option B - Composed of heavy and light polypeptide chains
Antibodies are glycoproteins made by B cell (B lymphocytes). They bind to specific foreign bodies such as antigens.

Antibodies are also known as immunoglobulin. They are composed of both heavy and light polypeptide chains. They consist of 2 heavy chains and 2 light chains arranged as a Y shaped molecule.

There are 5 isotypes of antibodies. They are found in different locations and they serve different purposes. These isotypes are: IgA, IgD, IgE, IgG and IgM.

IgA is expressed in mucosal surfaces and it forms dimmer after secretion. It is found in the mucosal lining of respiratory tract and the mucosal lining of the digestive system.
IgD – expressed on surface of immature B cells
IgE – Seen in allergy
IgG – opsonisation and neutralizing activates
IgM - first antibody produced upon invasion by antigen.

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Larry Thornton

Larry Thornton

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Larry Thornton
Larry Thornton, Student, MBA, Los Angles

Answered Feb 25, 2019

Antibodies react to particular characteristics of different antigens, binding them to the top ends of their Y formation. Once the antibody and antigen combine, the antibodies deactivate the antigen or lead it to macrophages, which is a kind of white blood cell. The macrophages ingest and destroy it.

The antibody is a large Y shaped protein produced mainly by plasma cells. Polypeptide chains are a chain of amino acids joined together through peptide bonds. The antibodies are composed of heavy light polypeptide chains. There are three binding sites per antibody monomer.

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lindali6

lindali

lindali6
Lindali

Answered Nov 15, 2017

Composed of heavy and light polypeptide chains
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