Question

The most abundant antibody found in serum is

• A. IgA
• B. IgG
• C. IgM
• D. IgE
• E.

Hint:

IgG is the most prevalent antibody in the serum and plays a key role in immune defense.

Answer 1

The Correct Option is B

Step 1: Antibody Basics.
Antibodies, or immunoglobulins, are proteins made by the immune system to detect and eliminate foreign invaders like bacteria and viruses.
Step 2: Antibody Abundance.
- IgG is the most prevalent antibody in human serum, making up approximately 75-80% of all immunoglobulins.
- IgA is located in mucosal regions, including the respiratory and gastrointestinal tracts.
- IgM is the initial antibody produced in an immune response but is less common than IgG.
- IgE is linked to allergic reactions and exists in significantly lower amounts.
Step 3: Summary.
IgG is the most abundant antibody in serum. Thus, the correct choice is (2).