The Evolution of Viruses and the RNA to DNA Transition Quiz

The four major steps in virus entry are: 1) attachment, 2) entry, 3) transport, and 4) uncoating.

Enveloped viruses can enter through fusion of the envelope with the cell membrane or membranes of early or late endosomes. Non-enveloped viruses enter through receptor-mediated endocytosis followed by rupture of the endosomal membrane or passage of the viral genome through a channel in the membrane.

Viruses can be transmitted cell to cell via cell-cell contact, virus assembly and transmission at virological synapses, formation of syncytia, and intracellular channels such as plasmodesmata.

<p>Attachment factors and adhesion receptors are involved in binding the virion to the cell, while entry receptors play an active role in conformational changes, cell signaling, and endocytosis. They interact with viral surface components and facilitate entry via various mechanisms.</p> Signup and view all the answers