Question

Select the correct statement w.r.t. immunity.

• A. Each antibody molecule has three peptide chains, two small called light chains and one longer called heavy chain
• B. The primary and secondary immune responses are carried out with the help of T-lymphocytes only
• C. The T-lymphocytes are responsible for cell-mediated immunity
• D. Only IgA and IgM are produced in human body

Answer 1

The correct option is C The T-lymphocytes are responsible for cell-mediated immunity

Each antibody has four peptide chains, two small called light chains and two longer called heavy chains.

The primary and secondary immune responses are carried out with the help of two special types of lymphocytes present in human blood. i.e., B-lymphocytes and T-lymphocytes. IgA, IgG, IgM, IgD and IgE are produced in human body.