BPSC – Combined Competitive Examination · வினா 141
Which class of immunoglobulin is the first to be produced in response to an infection?
விடையைக் காட்டு & விளக்கம்
விடை: (C) IgM
விளக்கம்
IgM appears first after exposure; IgG follows and gives long-term protection.
- (A) தவறு
Wrong: IgG dominates later (secondary) responses.
- (B) தவறு
Wrong: IgA protects mucosal surfaces.
- (C) சரி
Correct: IgM (a pentamer) is the first antibody made in a primary response.
- (D) தவறு
Wrong: IgE is involved in allergy and parasites.