Describe three ways that animal viruses enter into a host cell.

Expert Solution

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direct penetration of genetic material, membrane fusion, and endocytosis

endocytosis: This process is seen in viruses with no protein coat. the host cell takes up the virus by endocytosis through the cell membrane. . on engulfing the virus, he virus must now break out of the vesicle and then causes an infection. eg Hepatitis

direct entry of genetic material: In this method the virus simply attaches to the specific surface receptors on the cells and injecting only its genome into the cell. The other parts remain outside the cell and are not involved in the infection

Membrane fusion: This is only seen in viruses which infact have a viral coat. The virus attaches to the receptors on the surface of the cell Following attachment, the viral envelope fuses with the host cell membrane, and then the contents within the coat are injected into the cell. Thus the viral envelope fuses with the cell surface in this method. eg : HPV

gladiator answered 2 years ago

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