Viruses - Viruses

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Viruses Technically, viruses are not members of the Monera kingdom. They are considered here because,  like the bacteria, they are microscopic and cause human diseases.  Viruses  are acellular particles  that lack the properties of living things but have the ability to replicate inside living cells. They have  no energy metabolism, they do not grow, they produce no waste products, they do not respond to  stimuli, and they do not reproduce independently. In the view of biologists, they are probably not  alive.  Viruses consist of a central core of either DNA or RNA surrounded by a coating of protein. The core  of the virus that contains the genes is the  genome , while the protein coating is the  capsid . Viruses  have characteristic shapes. Certain viruses have the shape of an  icosahedron , a 20-sided figure  made up of equilateral triangles. Other viruses have the shape of a 
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This note was uploaded on 11/11/2011 for the course BIO 101 taught by Professor Pesthy during the Fall '07 term at Texas State.

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