| Group I | Group II |
| P. Coccus | 1. Treponema |
| Q. Rod | 2. Bacillus |
| R. Comma | 3. Neisseria |
| S. Spiral | 4. Vibrio |
Coccus refers to spherical bacteria, e.g., Neisseria. Rod morphology is seen in Bacillus. Comma-shaped bacteria are represented by Vibrio. Spiral morphology is characteristic of Treponema.
Match the type of bacterial flagella in Group I with their definitions in Group II
Group I Group II
(P) Monotrichous (1) Flagella only at both poles of the cell
(Q) Peritrichous (2) Two or more flagella at one pole of the cell
(R) Lophotrichous (3) Flagella distributed over the entire cell
(S) Amphitrichous (4) A single polar flagellum
Match the entries in Group I with that in Group II.
Group I Group II
P) Cholera toxin 1) Endotoxin
Q) Diphtheria toxin 2) Neurotoxin
R) Lipopolysaccharide 3) Enterotoxin
S) Tetanus toxin 4) Cytotoxin