The chemical substances which act against antigens are called __________ .
Antibiotics
Antibodies
Pathogen
Hormones
[ Carbohydrates , Lymphocytes , Proteins , erythrocytes , specific antigen ]
1. Chemically antibodies are ______________.
2. Antibodies are produced on exposure to _________________.
3. Antibodies are produced by a type of specialised _________________.
4.Antibodies are _______________ which means that one kind of antibody acts against only one particular type of antigen.