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Question:

Viruses have Either DNA or RNA, Prokaryotic nucleus, DNA enclosed in a protein coat, Single Chromosome

Prokaryotic nucleus

Single Chromosome

Either DNA or RNA

DNA enclosed in a protein coat

Solution:

Viruses are the acellular, small infectious agent that replicate only inside the living cells of organisms. The genetic material is made from either DNA or RNA enclosed by the protein coat. Thus, the correct answer is option D.