Which of the following cells become memory cells after immune response?
a) Cytotoxic T-cells
b) Helper T-cells
c) Suppresser T-cells
d) some B-cells
Antibodies are immune system related proteins called…….
a) haemoglobin
b) immunoglobolins
c) myoglobin
d) albumin
Each antibody consists of …….. polypeptide
chains.
a) two
b) three
c) four
d) five
Explanation: two heavy chains and two light chains
The variable region of antibodies composed of ………amino acids, give the antibody its specificity for binding antigen.
a) 23—30
b) 120—230
c) 110—130
d) 330—430
Antibodies are divided into ……major classes based on their constant structure and immune
function.
a) two
b) three
c) four
d) five
Explanation: IgM, IgG, IgD, IgA, IgG and IgE
Antibodies are produced by …….
a) B-lymphocytes
b) plasma cells
c) memory B-cells
d) all of these
