Question:
Which of the following is abundantly found in colostrum?
Which of the following is abundantly found in colostrum?
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IgA in colostrum provides passive immunity to infants against respiratory and gastrointestinal infections.
Updated On: Oct 16, 2025
- IgA
- IgG
- IgM
- IgD
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The Correct Option is A
Solution and Explanation
Step 1: Understanding colostrum.
Colostrum is the first secretion from the mammary glands after childbirth, rich in antibodies that protect the newborn.
Step 2: Key antibody.
IgA is the main immunoglobulin present in colostrum, which protects mucous membranes of infants from infections.
Step 3: Option analysis.
(1) IgA – Correct, abundantly present in colostrum.
(2) IgG – Present but not in high concentration.
(3) IgM – Found in trace amounts.
(4) IgD – Rarely present in colostrum.
Step 4: Conclusion.
Thus, the correct answer is (1) IgA.
Colostrum is the first secretion from the mammary glands after childbirth, rich in antibodies that protect the newborn.
Step 2: Key antibody.
IgA is the main immunoglobulin present in colostrum, which protects mucous membranes of infants from infections.
Step 3: Option analysis.
(1) IgA – Correct, abundantly present in colostrum.
(2) IgG – Present but not in high concentration.
(3) IgM – Found in trace amounts.
(4) IgD – Rarely present in colostrum.
Step 4: Conclusion.
Thus, the correct answer is (1) IgA.
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