Virology — DU B. Sc. (Hons) Microbiology Previous Year Question Papers

(c) Discuss the capsid symmetry of viruses giving suitable examples. 4 Q3 (a) Write the contribution of the following scientists (any four): 1x4=4 Albert Sabin (iv) Isaacs and Lindemann (V) David Baltimore (b) What are interferons? Discuss the mode of action of interferons. 6 (c) Discuss the emergence of variants of SARS-CoV2 and its management strategies. 4 Q4 Differentiate between the following (any six): 3×6=18 (i) Persistent and non-persistent transmission (ii) Recombinant viral vaccine and subunit vaccine. (iii) Virusoids and Satellite viruses (iv) Density-gradient and Differential centrifugation (V) Proto-oncogene and viral oncogene (vi) Diploid cell strain and continuous cell lines (vii) Enveloped and Non-Enveloped Virus Q5 (a) Discuss the salient features of influenza virus OR replication of geminivirus. 5 (b) Give two examples each of oncogenic RNA and DNA viruses. 2+2=4 (c) Explain the mode of action of lamivudine. 3 (d) Draw the genome of hepatitis B virus and discuss its salient features. 6 Q6 (a) Explain the control and management strategies of H1N1 and Dengue virus. 6 (b) Write short notes on the following (any three): 4x3 = 12 (ii) Giant viruses (ili) Prions