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BPSC Prelims 2025 General 📅 13 Sep, 2025

Which class of immunoglobulin is the first to be produced in response to an infection?

A
IgG
B
IgA
C
IgM
D
IgE
Result Summary
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APEDIA

BPSC Prelims
2025 • 13 Sep, 2025 • General
Which class of immunoglobulin is the first to be produced in response to an infection?
Correct Answer
IgM
Primary Response: IgM is the first antibody isotype secreted by adaptive immune cells during a new infection. [Image of IgM antibody structure] Structure......
💡 Analysis & Explanation
Primary Response
IgM is the first antibody isotype secreted by adaptive immune cells during a new infection.
[Image of IgM antibody structure]
Structure
It is a pentamer (large molecule), making it effective at clumping germs.
Follow-up
IgG is produced later but provides long-term immunity.