The mechanism of action of the antiviral drugs zanamivir [za-NUMM-i-veerj] and oseltamivir [oh-sel-TUHM-i-veerj] is to inhibit what virally encoded enzymes expressed on the surface of influenza virions [VV-ree-ons]?

W) Neuraminidase [nyoor-uh-MIN-uh-days]

X) Hemagglutinin [he-muh-GLU-ti-nin]

Y) Nonspecific protease

Z) Reverse transcriptase
W) NEURAMINIDASE