Question

Which one of the following statements about viruses are correct?

• A. Nucleic acid of viruses is known as capsid
• B. Viruses possess their own metabolic system
• C. All viruses contain both RNA and DNA
• D. Viruses are obligate parasites

Answer 1

The correct option is D Viruses are obligate parasites

Virus is a nucleoprotein entity which becomes active only inside a living cell. It utilizes the host machinery for multiplication.

Capsid is the protein coat covering the genetic material.

Virus lack metabolic system and do not grow. Viruses are obligate parasites. Viruses contain genetic material, that could be either RNA or DNA. No virus contains both RNA and DNA.