Give brief account of viruses with respect to their structure and genetic material.

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> [!TLDR]
> Viruses are acellular, obligate intracellular parasites made of a nucleic acid core (DNA or RNA, not both) surrounded by a protein coat (capsid); they show no signs of life outside a host cell.
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> **Structure:**
> - Viruses are so small they can be seen only under an electron microscope, and they lack any cellular organisation (no cytoplasm, organelles, or cell membrane of their own).
> - Every virus particle (virion) has an outer protein coat called the **capsid**, made up of small protein subunits called **capsomeres**, arranged around the genetic material. The capsid protects the nucleic acid and gives the virus its characteristic shape (helical, polyhedral, or complex).
> - Some animal viruses additionally have an outer lipoprotein envelope derived from the host cell membrane.
>
> **Genetic material:**
> - Every virus contains only ONE type of nucleic acid as its genome — either DNA or RNA — never both together.
> - The nucleic acid may be single-stranded or double-stranded, and linear or circular, depending on the virus. …

Q.Give brief account of viruses with respect to their structure and genetic material.

Concept understanding — Virus Structure And Genetic Material

Q.Give brief account of viruses with respect to their structure and genetic material.

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