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.
Correct Answer: D
Solution :Virus is a nucleoprotein entity which becomes active only inside the living cells utilizing the latter machinery for multiplication. Capsid is the protein covering around the genetic material.
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