A) Viruses are obligate parasites
B) Nucleic acid of viruses is known as capsid
C) Viruses possess their own metabolic system
D) All viruses contain both RNA and DNA
Correct Answer: A
Solution :
[a] Viruses are non cellular, obligate parasites. They have DNA or RNA as genetic material (never both). Genetic material of virus is covered in an envelope, known as Capsid. Viruses do not contain their own metabolic system instead they occupy hosts metabolic system after entrance in them.
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