Solapur University Question Paper,MICROBIOLOGY (Paper – XVI) Agricultural Microbiology, 2014 Question Paper.

Solapur University Question Paper M.Sc. (Part – II) (Semester – IV) Examination, 2014 MICROBIOLOGY (Paper – XVI) Agricultural Microbiology Day and Date : Tuesday, 29-4-2014 Total Marks : 100 Time : 3.00 p.m. to 6.00 p.m. Instructions :1) Part I, Q. 1 is compulsory. 2) Attempt any 4 questions from Part II. 3) Figures to the right indicate full marks. 4) Answer to the Part – I and Part – II are to be written in same answer booklet only. PART – I 1. A) Rewrite the sentences after choosing the correct answer from the given alternatives : 10 1) ‘Cry’ protein is produced by ______________ a) Bacillus popilliae b) Bacillus sphaericus c) Bacillus thuringiensis d) Bacillus cereus 2) The oxidation of ammonia to nitrite is carried out by _____________ species. a) Nitrosomonas b) Nitrosococcus c) Nitrobacter d) Both nitrosomonas and nitrososcoccus 3) Heterocysts are present _____________ a) Frankia b) Blue green algae c) Azotobacter d) Rhizobium 4) Fogg’s medium is used for the isolation of _____________ a) Frankia b) Cyanobacteria c) Azotobacter d) Rhizobium SLR-VO – 16 -2- 5) Green and purple sulfur bacteria use _____________ as electron donors in photosynthetic reduction of CO2 to carbohydrates a) H2 S b) H2 O c) Organic compounds d) Inorganic compounds 6) The organic matter content of soil is approximately _____________%. a) 10 – 15 b) 3 – 5 c) 40 – 45 d) 25 – 30 7) Water and air together account for approximately _____________% of the total volume of soil. a) 10 b) 5 c) 50 d) 30 8) White colour of the soil is due the presence of _____________ a) Hydrated iron oxide b) Unhydrated iron oxide c) Carbonates d) Iron sulphides and manganese oxides 9) ‘Cry’ protein is activated by _____________ enzyme in the midgut of susceptible larvae. a) Lipase b) Amylase c) Protease d) Phosphatase 10) The conversion of molecular nitrogen to ammonia is known as _________ a) Nitrogen fixation b) Nitrification c) Ammonification d) Denitrification B) Attempt the following questions : 10 1) Define the term ‘Town compost and Village compost’. 2) Give the advantages of green manure. 3) Define ‘Phosphorous mineralization and Phosphorous immobilization’. 4) List the nitrogen fixing algal species. 5) Define ‘Assimilatory nitrate reduction’. -3- SLR-VO – 16 PART – II 2. Describe in detail the large scale production of bacteria bioinsecticide by using Bacillus thuringiensis, its formulation and methods of application. 20 3. Give the detailed account of carbon cycle and its significance in the environment. 20 4. Describe the types, techniques and applications of plant tissue culture. 20 5. Attempt any two of the following : 20 a) Explain the production and methods of applications of vermicompost. b) Discuss the chemistry and mode of action of bacterial and fungal toxin on pests. c) Describe role and status of biopesticides in pest control. 6. Write short notes on any four of the following : 20 a) Phosphorous cycle b) Siderophores c) Composition and significance of root exudates d) Mycorrhizae as a biofertilizer e) Physical properties of soil f) Green manure. _____________

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