Industrial and Environmental Microbiology — DU B.Sc. (Hons.) Botany Previous Year Question Papers

All parts of a question must be answered together. Draw well-labelled diagrams wherever necessary. (c) Read the following sentence carefully and write True or False (Any five) 1 × 5 = 5 marks i. Elevated moisture levels in solid-state fermentation enhance microbial growth ii. condimical agents such as detergents are employed for cell disrupion during intracellular product recovery. ili. Chemical Oxygen Demand (COD) values generally exceed Biochemical Oxyge Demand (BOD) in water analysi iv. Fermentation involves the complete oxidation of carbohydrates to carbon dioxide and water. V. Milk pasteurization is carried out at temperatures exceeding 100°C. vi. Secondary metabolites predominantly accumulate during the idiophase of microbial growth. vii. Enterobacter aerogenes are classified under faecal coliforms. Q2. Differentiate between (Any three) 5×3 = 15 marks i. Batch fermentation and Continuous fermentation ii. Concentration and purification stages in downstream processing iii. Batch and Fed batch reactor iv. Lyophilization and spray drying V. Centrifugation and Filtration Q3. Write short notes on (Any three) 5×3 = 15 marks i. Components of a bioreactor ii. Industrial production of citric acid iii Scope of industrial microbiology iv. Penicillin acylases v. Water pollution control measures (a) Explain the role and stages of downstream processing of product recovery. 8 marks (b) Explain the advantages of enzyme immobilization in industrial applications, emphasizing its effects on enzyme efficiency and stability. 7 marks (a) What are coliforms? Discuss methods for detecting coliforms in drinking water. (b) Outline the sequential stages involved in wastewater treatment, highlighting the functional role of microorganisms at each stage. 7 marks