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7 Cards in this Set

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Virus classification

1) Are borderline between living or Non-living


2) Can be round, rod-shaped or complex in shape


3) Are obligate parasites

bacteriophage

Is a virus that infects a bacterium

Viruses replicate

By sending it's nucleic acid into a live host cell and using the host to produce new viruses

Viruses

Are tiny, consisting of a protein coat (capsid) and nucleic acid (either DNA or RNA)


1) Retroviruses have a protein coat, RNA and an enzyme to convert RNA TO DNA


2) viruses are non-cellular


3) They do not have cell organelles

Disadvantages of viruses

They cause


1) Human diseases


2) Plant diseases


3) Animal diseases

Advantages of viruses

They can


1) Transfer genes from one organism to another.


2) Can be used to control bacterial infections.

Viruses can be controlled by

1) The general body defences


2) The production of antibodies


3) Vaccination or


4) Drugs (partially)