Account Viruses Respect Their Structure Nature Genetic Material Common Viral Diseases

Give a brief account of viruses with respect to their structure and nature of genetic material. Also name four common viral diseases


Viruses : (a) They are non-cellular organisms.

(b) They remain inert outside living cell. They have genetic material DNA or RNA. No virus has both RNA and DNA.

(c) Plant infecting viruses have ssRNA but animal infecting viruses possess dsRNA. Viruses causes diseases like (1) mumps, (2) small pox, (3) herpes and (4) influenza.