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?

I. No virus can survive in ocean waters. False. Marine viruses are extremely abundant in oceans and survive/infect hosts there.
II. No virus can infect bacteria. False. Bacteriophages are viruses that infect bacteria.
III. No virus can change the cellular transcriptional activity in host cells. False. Many viruses alter host gene expression/transcription to favor their replication.
Hence, none of the statements is correct.