THE MOLECULAR BASIS OF INHERITANCE
THE GENETICS OF VIRUSES AND BACTERIA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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DNA, but never RNA
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RNA but never DNA
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DNA or RNA
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neither DNA or RNA
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Detailed explanation-1: -Viruses are smaller and simpler in construction than unicellular microorganisms, and they contain only one type of nucleic acid-either DNA or RNA-never both.
Detailed explanation-2: -The Basics of Viruses Unlike all other biological entities, some viruses, like poliovirus, have RNA genomes and some, like herpesvirus, have DNA genomes. Further, some viruses (like influenza virus) have single-stranded genomes, while others (like smallpox) have double-stranded genomes.
Detailed explanation-3: -These require the host cellular machinery to replicate and propagate their infection. The genetic material in viruses is either RNA or DNA. It is not possible for a virus to contain both RNA and DNA. This is because (biologically speaking), there doesn’t seem to be any need for it.
Detailed explanation-4: -Leuko virus contains both DNA and RNA.