Question:
Colostrum has abundant antibodies of type:
Colostrum has abundant antibodies of type:
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Colostrum = IgA-rich “first milk” providing passive immunity.
Updated On: Jun 20, 2026
- IgA
- IgG
- IgE
- IgK
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The Correct Option is A
Solution and Explanation
Step 1: Understanding colostrum.
Colostrum is the first yellowish fluid secreted by mammary glands after childbirth. It is rich in antibodies and provides passive immunity to the newborn.
Step 2: Role of antibodies in colostrum.
The primary function of colostrum is to protect the newborn from infections by supplying immunoglobulins.
Step 3: Importance of IgA.
IgA is the major antibody present in colostrum. It provides mucosal immunity by protecting respiratory and gastrointestinal tracts.
Step 4: Evaluating other options.
IgG is mainly transferred through placenta, IgE is related to allergies, and IgK is not a class of immunoglobulin.
Step 5: Biological reasoning.
IgA is secretory and stable in mucosal surfaces, making it ideal for neonatal protection.
Step 6: Final conclusion.
Thus, colostrum is rich in IgA antibodies.
Colostrum is the first yellowish fluid secreted by mammary glands after childbirth. It is rich in antibodies and provides passive immunity to the newborn.
Step 2: Role of antibodies in colostrum.
The primary function of colostrum is to protect the newborn from infections by supplying immunoglobulins.
Step 3: Importance of IgA.
IgA is the major antibody present in colostrum. It provides mucosal immunity by protecting respiratory and gastrointestinal tracts.
Step 4: Evaluating other options.
IgG is mainly transferred through placenta, IgE is related to allergies, and IgK is not a class of immunoglobulin.
Step 5: Biological reasoning.
IgA is secretory and stable in mucosal surfaces, making it ideal for neonatal protection.
Step 6: Final conclusion.
Thus, colostrum is rich in IgA antibodies.
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