Question

what is the difference between antibody, antitoxin, antibiotic and antigen?

Answer 1

Antibody is a high weight molecular protein produced by the specialised B cells in response to an antigen. It is used to fight disease causing germs and agents in the body.
An antitoxin is an antibody which is formed in response to and capable of fighting against a particular toxin of biological origin.
Antibiotic is a substance which is produced by a semisynthetic process or derived from a microorganisms and is capable of killing or inhibiting the growth of other microorganisms.
Antigen is any foreign substance which invokes an immune response from the body.