Virus
Viruses are not actually cells. They do not need food as a
source of energy. The only living process occurs in virus is reproduction; but
they can not reproduce independently.
Virus have a coat of protein enclosing a strand of nucleic
acid. Only one nucleic acid is found in a virus. That can be either DNA or RAN.
DNA is Deoxyribo Nucleic Acid. And RNA is Ribo nucleic Acid. Viruses infect and
take over the biological machinery of cells to reproduce new viruses. Viruses are
totally parasitic. Chicken pox, measles, aids, common cold, influenza are some
diseases caused by viruses.
Viruses are not actually cells. They do not need food as a
source of energy. The only living process occurs in virus is reproduction; but
they can not reproduce independently.
Virus have a coat of protein enclosing a strand of nucleic
acid. Only one nucleic acid is found in a virus. That can be either DNA or RAN.
DNA is Deoxyribo Nucleic Acid. And RNA is Ribo nucleic Acid. Viruses infect and
take over the biological machinery of cells to reproduce new viruses. Viruses are
totally parasitic. Chicken pox, measles, aids, common cold, influenza are some
diseases caused by viruses. 
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