The Influenza Virus Gains Entry into a Host Cell by an Endocytotic

question 56

Multiple Choice

The influenza virus gains entry into a host cell by an endocytotic process.The viral nucleocapsid leaves the endosome and enters the cytoplasm through a membrane fusion mechanism.Fusion of the viral envelope with the endosomal membrane is facilitated by

• A)a conformation change in the hemagglutinin to expose a fusion protein.
• B)the production of a lipase by the influenza virus.
• C)sialic acid residues of the receptor proteins.
• D)specific viral protein recognition of pores in the endosome vesicle.
• E)the production of proteases by the influenza virus.

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