Bacterial Diversity and Systematics — DU B. Sc. (Hons) Microbiology Previous Year Question Papers

(b) Explain the different categories of the bacteria based on oxygen requirements. (5) (c).Discuss the motility in A4);cap/czs773cz. (3) 6. (a) Give causative agents of the following diseases (any four) : (i) Rogky mountain spotted fever (iii) Peptic ulcer (b) Enlist the salient features and habitat of Methanogens. Discuss their ecological significance. (5) (c) Diagrammaticall.y explain the. life cycle of (d) Write the characteristic features of Picrophilus. 1. (a) Define the following terms (any four) : (2x4=8) (i) Bacterial strains (iii) Taxonomy (b) Comment upon the role of rRNA oligonucleotide sequencing in classification. (4) (c) What are salient features of Nanoarchaeota? (d) List six classes of proteobacteria. (3) 2. (a) Write short notes on the following (any three): (5x3=15) (iii) Bacillus (iv) Bacterial diversity based on pH (b) Why is Deinococcus radiodurans resistant to high dose of radiation? (3) 3. (a) Differentiate between the following (any three) : (4x3=12) (i) Phenetic and Phylogenetic classifications (ii) Elementary body and Reticulate body in (iii) Thiobacillus and Clostridium (b) Explain nucleic acid hybridization technique and comment on its role in molecular taxonomy. 4. (a) What is FAME analysis? How it can be utilized for bacterial identification. (5) (b) Describe the life cycle of Bdellovibrio with the help of diagram. (6) (c) Give the economic importance of Mycobacterium. Why is it called acid-fast bacterium? (4) (d) Give ecological importance of Thermotoga. (3) 1 5. (a) Give salient features and importance of the following (any two) : (5x2=10)