Viruses have
- DNA enclosed in a protein coat
- prokaryotic nucleus
- single chromosome
- both DNA and RNA.
Answer
(1) DNA enclosed in a protein coat
Solution
As per NCERT, viruses are nucleoproteins: they contain genetic material (either RNA or DNA, never both) enclosed in a protein coat called capsid.
∵ Viruses are not cellular, they have no nucleus or chromosome.
∴ Viruses have DNA (or RNA) enclosed in a protein coat.
Answer: (1)