Some viruses are able to bind to the cell surface membrane before entering the host cell.
Which sequence of events will lead to a virus invading a cell?
1 )
binding to a cholesterol molecule, followed by endocytosis
2 )
binding to a glycoprotein receptor, followed by exocytosis
binding to a protein receptor, followed by endocytosis
4 )
binding to the hydrophilic portion of a phospholipid, followed by exocytosis
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