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Which one of the following antibodies initiates an allergic reaction? - Biology (Theory)

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Question

Which one of the following antibodies initiates an allergic reaction?

Options

  • lgA

  • lgE

  • lgG

  • lgM

MCQ
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Solution

lgE

Explanation:

IgE antibodies are responsible for allergic reactions (type I hypersensitivity). When IgE binds to allergens, it triggers the release of histamine and other chemicals from mast cells and basophils, causing symptoms like sneezing, watery eyes, and difficulty breathing. This process underlies immediate allergic responses.

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Chapter 10: Human Health and Diseases - TEST YOUR PROGRESS [Page 424]

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Nootan Biology [English] Class 12 ISC
Chapter 10 Human Health and Diseases
TEST YOUR PROGRESS | Q 1. 27. | Page 424
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