Consider the following statements III. No virus can change the cellular transcriptional activity in host cells.

Question

Consider the following statements:

I. No virus can survive in ocean waters.

II. No virus can infect bacteria.

III. No virus can change the cellular transcriptional activity in host cells.

How many of the statements given above are correct?

1. A. Only one
2. B. Only two
3. C. All the three
4. D. None (Correct answer)

Correct Answer

Option D — None

Detailed Solution & Explanation

The correct answer is None.

Key Points

• Viruses can and do survive in ocean waters — marine viruses are among the most abundant entities on Earth (Statement I wrong).
• Bacteriophages are viruses that specifically infect bacteria and are extremely common (Statement II wrong).
• Many viruses alter host cell transcription machinery to ensure their own replication — this is a fundamental mechanism of viral infection (Statement III wrong).
• None of the statements is correct.