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NEET 2015
Exam
NEET
Year
2015
Subject
Zoology
Chapter
Human Health and Diseases

NEET 2015 · Zoology · Human Health and Diseases

Which of the following immunoglobulins does constitute the largest...

Which of the following immunoglobulins does constitute the largest percentage in human milk?

Options

  1. AIgM
  2. BIgA
  3. CIgG
  4. DIgD

Correct answer

B. IgA

Step-by-step solution

IgG: Smallest antibody. Only antibody that move through placenta and provide passive immunity in foetus. It occurs in form of monomer.
IgA: Only antibody that move through colostrum and provide passive immunity in infants. It occurs in form of dimer.
IgM: Largest antibody. It occurs in form of pentamer. Hence, a single antibody can negate the effect of 10 antigens.
IgD: Very rare form of antibody. It occurs in form of monomer.
IgE: It is responsible for inducing allergic reactions and hypersensitivity

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