Microbial Physiology and Metabolism-II — DU B. Sc. (Hons) Microbiology Previous Year Question Papers

iv. Process by which cyanobacteria convert light energy into chemical energy, releasing oxygen as a by product. 4. a) Write short notes on the following (any 2): 6x2=12 i. Calvin cycle ii. Electron transport in green bacteria ili. Mechanism of nitrogen fixation b) Give the contributions of the following scientists (any 3): 2x3=6 i. Robert Hill il. Sergei Winogradsky i11. Carnahan iv. Zeikus and Wolfe 5. a) What are methanogens? Describe Barker's scheme of methanogenesis. Discuss the experimental evidence demonstrating that methane formation is coupled to ATP synthesis. b) Fill in the blank: 1x4=4 i. The final product of assimilatory nitrate reduction is Assimilatory nitrate reduction is primarily involved in An example of alcohol producing bacteria_ iv. The most abundant protein on earth is c) What are mixotrophs? 2 6. a) Explain the flow of electrons during oxygenic photosynthesis in cyanobacteria with the help of a suitable diagram. 8 b) Describe phycobilisomes. 4 c) What is the Pasteur effect? Describe it's molecular basis. 6