Genome of viruses is composed of: ____________?
Correct answer: D. Both A & B
- A. DNA
- B. RNA
- C. Protein
- D. Both A & B
Explanation
Viruses have genomes made of nucleic acid, and different viruses may contain either DNA or RNA, although an individual virus normally contains one type rather than both. Students may choose DNA or RNA alone by generalizing from one virus group, but both types occur among viruses as a whole. Hence, option d is correct.
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About Viruses
Viruses are acellular infectious particles made of genetic material enclosed by a protein capsid, sometimes with a lipid envelope. Their replication depends on a host cell and may follow lytic or lysogenic cycles, so viral structure and reproduction differ fundamentally from those of cellular organisms such as bacteria.
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