21. What is the main role of neuraminidase (NA) in the influenza virus life cycle?
(A) Binding to sialic acid receptors on host cells.
(B) Cleaving sialic acid residues to release newly formed virions.
(C) Facilitating viral RNA replication in the nucleus.
(D) Triggering endosomal escape of the viral genome.
(E) Stabilizing the influenza virus in extracellular environments.
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統計: A(1), B(0), C(0), D(0), E(0) #3662529
統計: A(1), B(0), C(0), D(0), E(0) #3662529