Question

Which of the following is true about viruses?

A. They are parasitic.
B. They have no nuclei.
C. They can hold either DNA or RNA.
D. All of the above.

Answer 1

Viruses are parasitic, acellular entities without nuclei, containing either DNA or RNA, and require a host cell to replicate, making 'All of the above' the correct answer.

Step-by-step explanation:

The correct answer to the question of which of the following is true about viruses is D. All of the above. Viruses are indeed parasitic, as they require a host to reproduce. They have no nuclei and are therefore considered acellular. Additionally, viruses can contain either DNA or RNA as their genetic material but never both at the same time. They use the replication machinery of the host cell to multiply since they don't possess cellular structures required for reproduction on their own. While all viruses have a nucleic acid core and a protein capsid, some may also have an outer lipid envelope with glycoproteins that facilitate attachment to the host cell.