Question

Which of the following statements are true about Antibodies?
A. IgA protects body surfaces so called surface antibody
B. IgG found more or less in every body fluid and so called secretory antibody
C. IgD activates B-lymphocytes
D. IgM is having pentameric structure and having $5$ paratopes

• A. A, B, C
• B. Only C
• C. A, B
• D. A, B, C, D

Answer 1

Answer: (D)

A, B, C, D

IgA plays an important role in the surface properties as it maintains the immunity in the mucous membranes and hence called surface antibodies.

IgG is found in blood and extracellular fluid , it prevents any infections enhance is called secretory antibody.

IgD activates the B cells which are then ready to defend the body.

IgM has a pentameric structure but has 10 paratopes.

So the correct answer is 'A, B, C, D'.