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. Which of the statements given above are correct?
Correct answer: D
Explanation
Viruses can survive in oceans, infect bacteria, and alter host cell transcription.
Statement I: False. Viruses can survive in ocean waters, and marine viruses are highly abundant.
Statement II: False. Viruses can infect bacteria; for example, bacteriophages specifically infect bacteria.
Statement III: False. Viruses can alter host transcription and modify host gene expression.
None of the statements are correct.