Introduction to Microbial World — DU B. Sc. (Hons) Microbiology Previous Year Question Papers

Define the following (any nine): 2x9=18 Bacteriophage, Superbug, Cyst, Holocarpic fungi, Mushroom, Carbon sequestration, Capsid, Plaque, Dimorphic fungi, Pseudomycelium. (a) Differentiate between the following (any four) : 4x4=16 (i) Lytie and Lysogenie cycle (io) Fungal cell wall and Algal cell wall (u) Viroids and Prions. (6) Give an example of viruses having : 2 (i) Icosahedral symmetry (ii) ssRNA genome. (a) Write short notes on (any four) : 3x4=12 (i) Human Microbiome (i) Space Microbiology (v) Germ theory of diseases (b) Draw a well labelled diagram of sexual reproduction in Rhizopus. 4 (c) What is bioaugmentation ? 2 (a) Briefly explain any two evidences which disapprove the theory of spontaneous generation. 5 (b) What are vaccines? Describe its types with examples. 5 (c) Discuss the structure of Giardia with the help of a well-labelled diagram. 4 (d) Name the organisms involved in production of (any four) : 4 Acetic acid, Invertase; Citric Acid, Carrageenan, Yogurt, Kefir (a) Who gave 3 domain classification? What is the basis of the classification ? (b) Discuss various modes of locomotion in protozoa. 4 (c) What is eye spot? Give its significance. 3 (d) What is biogas ? Give examples of two producer microorganisms. 3 (e) Differentiate between prokaryotes and eukaryotes. 4 6. (a) Write the contribution of the following scientists (any four) : N 2×4=8 Paul Ehrlich, Joseph Lister, M Beijerinck, Sergei Winogradsky, Louis (b) Comment upon the following (any four) : 2.5×4=10 Phage therapy, Bioleaching, Rhizomorph, Dolipore Septum, Algal Blooms