Why Do Viruses Depend on Host Cells
Virus Entry into Animal Cells Is Initiated by Attachment to Receptors and Is Followed by Important Conformational Changes of Viral Proteins, Penetration...
How do viruses recognize and attach to host cells?
A virus attaches to a specific receptor site on the host cell membrane through attachment proteins in the capsid or via glycoproteins embedded in the viral envelope. The specificity of this interaction determines the host—and the cells within the host—that can be infected by a particular virus.
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How do viruses replicate within a host cell?
Viruses cannot replicate on their own, but rather depend on their host cell’s protein synthesis pathways to reproduce. This typically occurs by the virus inserting its genetic material in host cells, co-opting the proteins to create viral replicates, until the cell bursts from the high volume of new viral particles.
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