Question

Explain nature and features of viruses.

Answer 1

Answer:

Nature

Viruses are infective microorganisms

Structure

Viruses have very simple structure.They consist of nucleic acid core surrounded by protein coat.Some viruses are also enclosed by an envelop of fat and protein molecules.A virus particle is called Virion

Answer 2

$\huge \underbrace \mathfrak \green {Answer }$

➽ They are ultra-microscopic and can only be visualized under electron microscope.

They are devoid of the sophisticated enzymatic and biosynthetic machinery essential for independent activities of cellular life. They do not increase in size.They can pass through filters, through which bacteria cannot pass.All viruses have a capsid or head region that contains its genetic material. The capsid is made of proteins and glycoproteins. Capsid contruction varies greatly among viruses, with most being specialized for a particular virus's host organism.

Some viruses, mostly of the type infecting animals, have a membranous envelope surrounding their capsid.This allows viruses to penetrate host cells through membrane fusion.

The virus's genetical material rests inside the capsid; that material can be either DNA, RNA, or even in some cases a limited number of enzymes.