Discussion
Match the bacteria in Column I with their respective characteristic features in Column II.
| Column I | Column II |
|---|---|
| (P) E. coli | (1) Gram-positive, round-shaped and non-spore formers |
| (Q) B. subtilis | (2) Gram-negative, rod-shaped and non-spore formers |
| (R) S. aureus | (3) Gram-positive, rod-shaped and spore formers |
| (S) L. monocytogenes | (4) Gram-positive, rod-shaped and non-spore formers |
Answer: C
The correct matching is P-2; Q-3; R-1; S-4.
- E. coli is a Gram-negative rod that does not form spores (2).
- Bacillus subtilis is a Gram-positive rod that forms endospores (3).
- Staphylococcus aureus is a Gram-positive coccus (round) that does not form spores (1).
- Listeria monocytogenes is a Gram-positive rod that does not form spores (4).
Option D swaps Bacillus and Listeria, the two Gram-positive rods, which differ only in spore formation. Options A and B mismatch E. coli or S. aureus.
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