For influenza virus infection to proceed, the viral envelope
must fuse with the host cell membrane following receptor attachment. This
process depends on precise structural rearrangements of the haemagglutinin
protein.

Which statement best describes HA’s role in
enabling this fusion process?

Question

For influenza virus infection to proceed, the viral envelope
must fuse with the host cell membrane following receptor attachment. This
process depends on precise structural rearrangements of the haemagglutinin
protein.

Which statement best describes HA’s role in
enabling this fusion process?

Accepted Answer

Change
in pH triggers HA to change shape, exposing fusion machinery that merges viral
and host membranes

Answer

HA
molecules assemble into pores that directly transport viral RNA into the
cytoplasm

Answer

Individual
HA subunits independently penetrate the membrane to deliver genetic material

Answer

HA
remains structurally rigid while host enzymes actively transport the viral
genome into the cell

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For influenza virus infection to proceed, the viral envelope must fuse with the...

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