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Pune University - Evolution, Ecology and Environmental Microbiology, April 2010

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Total No. of Questions : 5] [Total No. of Pages : 2 P998 [3725] - 22 M.Sc. MICROBIOLOGY MB - 602 : Evolution, Ecology and Environmental Microbiology (2005 Pattern) Time : 3 Hours] [Max. Marks : 80 Instructions to the candidates: 1) All questions are compulsory. 2) All questions carry equal marks. 3) Draw neat labeled diagrams wherever necessary. 4) Figures to the right indicate full marks. 5) Use of logarithmic tables and electronic pocket calculator is allowed. 6) Assume suitable data, if necessary. Q1) Attempt any one of the following: [16] a) Describe the critical operating parameters of an activated sludge treatment system, and explain the resulting malfunctions if these parameters are not maintained optimally. b) Discuss the molecular evolution with context to the origin of new genes and proteins. Q2) Attempt any two of the following : [16] a) Explain the various sedimentation phenomena observed during a settling process. b) Describe how chemical disinfection of wastewater is achieved. What is break-point chlorination? c) Explain the succession, competition and predation within the microbial communities of rhizosphere. P.T.O. Q3) Attempt any two of the following : [16] a) Describe neutral evolution and elaborate on its significance to molecular phylogeny. b) Describe the various habitats in marine ecosystem based on topography. c) Describe the various mycorrhizal associations with respect to hostfungus specificity. Q4) Write short notes on any four of the following : a) Flotation unit process. b) Aerated lagoons. c) Major pollutants present in dairy wastewater. d) r and k selection. e) DOM utilization strategies in marine ecosystem. [16] Q5) A single-stage tricking filter has a diameter of 10.0m and depth of 6.0m. The characteristics of primary effluent wastewater to be treated by this filter are as follows : [16] Flow rate : 3000 m3/d BOD : 100 mg/L TSS : 70 mg/L TKN : 20 mg/L Determine the following : a) BOD loading rate. b) TKN loading rate. c) BOD removal efficiency. d) Can nitrification be expected. vvvv [3725]-22 2

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Additional Info : M.Sc. MICROBIOLOGY, MB - 602 : Evolution, Ecology and Environmental Microbiology (2005 Pattern), Pune University
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