BSc Biotechnology Sem IV 2015 16 2015-16 BIOTECH II Question Paper - Mumbai University | munotes

Questions asked in this paper

1. Q3 Figures to th necessary
   • A) Define the following
   • i) Cooperation Any Four) 8 the following. (Any Two) 12
   • i) Explain sulfur Cycle,
   • ii) Whati amensalism ? with suitable example ain the concept of Autecology on antagonism with an appropriate example
2. Q2 Fill in the (Any Four) 4 marks
   • i) The number of Microorganisms in dirty untidy rooms are ___ than in clean rooms. (greater, lesser, equal to)
   • ii) Sedimentationisa method of enumeration of air microflora
   • iii) Hypocholorus acid or a hypochlorite in a final concentration of ____ million is sufficient to produce 90 to 99 percent reduction of viruses as well as bacteria
   • iv) The germicidal lamp is a low pressure lamp. (tungsten, mercury, iron)
   • v) Inthe breakdown of the first step is hydrolysis to aminoacids
   • vi) Nodule formation occur exclusively on plants of the family,
   • vii) Ina plants during photosynthesis, the CO, is reduced to ____ andthe H,Ois decomposed with the liberation of oxygen. (carbohydrates, proteins, lipids)
   • viii) During photosynthesis bacteria evolve oxygen. (do, dont, some times)
   • B) State weather following statements are true or false. (Any Four) 4
   • i) The presence of micro organisms in air is of considerable importance economically and to
   • ii) Spores are those forms of the microorganisms which are capable of resisting unfavorable conditions for long periods of time
   • iii) The most important factors in maintaining or improving the granulation of soils are the presence of micro organisms and their decomposition products
   • iv) Rhizobium is a non symbiotic nitrogen fixing micro organisms. al Nitrogenase is a oxygen sensitive enzyme Barterio chlorphylls are responsible for bacterial photosynthesis
   • vii) Droplet nuclei are considered important in the transmission of pathogenic
   • viii) The depth of air borne cells decreased as humidity increased and temperature decreased,
   • C) Answer the following : (Any Two) 12
   • i) Describe enumeration of bacteria in air using Hollander and Dalla valle sampler
   • ii) Explain enumeration of bocteria in air using electrostatic air sampler li) Give a brief account on symbiotic nitrogen lv) Give a brief account on Azotobacter
3. Q3 A) Explain the following terms :(Any Three)
   • B) Name the following: (Any One) 2 Two in confirmed test of bacteriological analysis of potable
   • ii). Two methods of disinfection of = “Answer the following : (Any 12
   • i). Describe chlorination and ultraviolet rays as methods of disinfection of potable-water Give a brief account on presumptive, confirmed and completed tests for coliforms Give the chemical and microbiological characteristics of waste Explain the single dwelling units with respect to treatment of waste water for smaller 4 Write a short note on the following : (Any Three)

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