Question

Assertion : Antigen can be easily recognised because it has antigenic determinants.

Reason : The recognition ability is innate.

(a) Both A and R are true and R is the correct explanation of A.

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

Answer 1

Correct option (b) Both A and R are true but R is not correct explanation of A

Explanation :

Antigen is any substance that may be specifically bound by an antibody molecule. The antigens are mostly proteins, but can be polysaccharides, glycoproteins or other types of conjugated proteins, nucleic acid or such chemicals. Each antigen has many antigenic determinants (called epitopes) of the antigen. As each antibody binds with 2 or more such determinants, the one antigen can bind with many antibodies. The recognition ability is innate and develops without exposure to the antigen.