1. Hemagglutination and hemagglutination inhibition assays can be used for the following purposes, EXCEPT: Demonstration of presence of hemagglutinin-expressing virus Demonstration of presence of neuraminidase-expressing virus Finding out the serotype of virus Finding out serotype of virus antibodies Demonstration of infectivity of virus 2. Virus may acquire resistance to antiviral chemotherapy through the following mechanisms, EXCEPT Mutation Recombination Transduction Transformation Reassortment

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