GATE 2023 BT – Question 38
Match the virus in Group I with the type of genome it contains in Group II.
| Group I | Group II |
|---|---|
| P. T4 bacteriophage | 1. dsRNA |
| Q. SARS-CoV-2 | 2. ssDNA |
| R. Pseudomonas phage φ6 | 3. dsDNA |
| S. φX174 bacteriophage | 4. ssRNA |
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Correct answer: (A) P-3, Q-4, R-1, S-2
Explanation
Match each virus with the nucleic acid it carries.
- **P. T4 bacteriophage:** linear double-stranded DNA. P-3.
- **Q. SARS-CoV-2:** a positive-sense single-stranded RNA virus. Q-4.
- **R. Pseudomonas phage φ6:** a bacteriophage with a segmented **double-stranded RNA** genome (three segments). R-1.
- **S. φX174:** a small phage with a circular **single-stranded DNA** genome. S-2.
Match: **P-3, Q-4, R-1, S-2** (option A).