Question

1. Chemically speaking an antigen is generally

a) As amino acid
b) A protein
c) A protein or polysaccharide present on
the surface of the cell wall of bacterium
d) A polysaccharide on the surface of the
pathogen





2. If the antigen-antibody reaction occurs in the
tissues instead of occurring in the blood, it result

a) Instant blood coagulation
b) Sudden death
c) Loss of blood proteins
d) Allergic reaction
​

Answer 1

1..c) A protein or polysaccharide present on

the surface of the cell wall of bacterium

2.a) Instant blood coagulation