Multiple Choice
Which of the following processes allows for the creation of so many diverse antibodies?
21. The Immune System
Antibody Structure and Diversity
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Which region of an antibody is responsible for binding to a specific antigen?
A
Variable region
B
Hinge region
C
Constant region
D
Fc region
Verified step by step guidance1
Understand the structure of an antibody: An antibody is a Y-shaped protein composed of two heavy chains and two light chains. It has distinct regions, including the variable region, constant region, hinge region, and Fc region.
Learn the function of the variable region: The variable region is located at the tips of the Y-shaped antibody. It contains unique amino acid sequences that form the antigen-binding site, allowing the antibody to recognize and bind to specific antigens.
Differentiate the other regions: The constant region determines the antibody's class and interacts with immune cells. The hinge region provides flexibility to the antibody, and the Fc region interacts with cell surface receptors and complement proteins but does not bind antigens.
Identify the correct answer: Since the variable region is responsible for binding to specific antigens, it is the correct answer to the question.
Review the concept: The specificity of an antibody for its antigen is due to the unique structure of the variable region, which is shaped to fit a particular antigen like a lock and key.
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Antibody Structure and Diversity practice set
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