Discussion
Correctly match the viruses listed in Column I with the nature of their corresponding genetic materials listed in Column II.
| Column I | Column II |
|---|---|
| P. Bacteriophage lambda | i. dsDNA |
| Q. Bacteriophage M13 | ii. ssDNA |
| R. Coronavirus | iii. ssRNA |
| S. Reovirus | iv. dsRNA |
Answer: C
The correct match is P - i; Q - ii; R - iii; S - iv.
- Bacteriophage lambda has a linear double-stranded DNA genome that circularises after infection.
- Bacteriophage M13, a filamentous phage, packages circular single-stranded DNA, which is why it was used to make single-stranded templates for sequencing.
- Coronaviruses have a large positive-sense single-stranded RNA genome.
- Reoviruses have a segmented double-stranded RNA genome.
The other options give M13 RNA or double-stranded DNA, or make reovirus a DNA virus, each contradicting these well-known genome types.
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