Posted by Top Coaching Experts A virus is a sub-microscopic infectious agent tha
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Question
Posted by Top Coaching ExpertsA virus is a sub-microscopic infectious agent that is unable to grow or reproduce outside a host cell this characteristic enables it to differentiate from bacteria.
Their disease producing potential shows that they are important biological entities.
Study of virus is known as Virology.
Historical points about virus
Term virus was coined by Louis Pasteur for any unknown agent causing disease.
The first known virus, tobacco mosaic virus, was discovered by M.Beijernick in 1899.
The existence of virus was scientifically proved by D. Iwanowski
Structure: viruses vary in size considerably. Viruses are about 100 times smaller than bacteria.
Most viruses which have been studied have a diameter between 10 and 300 nanometers.
Electron microscope is used to visualize virus particle.
1. The smallest plant virus is satellite tobacco necrosis virus
2. The longest plant virus is citrus Tristeza virus.
3. The smallest animal virus is foot and mouth disease virus.
4. The largest animal virus is Pox virus.
5. The most complex animal virus is Parrot fever virus.
A complete virus particle, known as a virion, consists of nucleic acid and coat of protein called a capsid. These are formed from identical protein subunits called Capsomere and have lipid envelope derived from the host cell membrane
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Explanation / Answer
i have check its spelling Posted by Top Coaching Experts A virus is a sub-microscopic infectious agent that is unable to grow or reproduce outside a host cell this characteristic enables it to differentiate from bacteria. Their disease producing potential shows that they are important biological entities. Study of virus is known as Virology. Historical points about virus Term virus was coined by Louis Pasteur for any unknown agent causing disease. The first known virus, tobacco mosaic virus, was discovered by M.Beijernick in 1899. The existence of virus was scientifically proved by D. Iwanowski Structure: viruses vary in size considerably. Viruses are about 100 times smaller than bacteria. Most viruses which have been studied have a diameter between 10 and 300 nanometers. Electron microscope is used to visualize virus particle. 1. The smallest plant virus is satellite tobacco necrosis virus 2. The longest plant virus is citrus Tristeza virus. 3. The smallest animal virus is foot and mouth disease virus. 4. The largest animal virus is Pox virus. 5. The most complex animal virus is Parrot fever virus. A complete virus particle, known as a virion, consists of nucleic acid and coat of protein called a capsid. These are formed from identical protein subunits called Capsomere and have lipid envelope derived from the host cell membrane M
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