Environmental Biotechnology — DU B.Sc. (Hons.) Environmental Science Previous Year Question Papers

Describe the application of bioreactors in the treatment of industrial wastewater. Provide a step-by-step explanation of their operation and benefits. Sciences - Core Answer any four questions. 1. (a) Explain the structural forms of DNA and their biological significance. (8) (b) Define post-translational modifications, list their types, and briefly describe their significance in protein functionality. (7) 2: Write short notes on the following (any three) : (a) Nernst equation and its relevance to electrochemical cells. (b) Restriction enzymes and their types. (c) Composting as a solid waste treatment method. (d) Bio-control of plant pathogens. . 3. Differentiate between the following (any three): (a) Euchromatin and Heterochromatin (b) Genomic and cDNA libraries (d) Aliphatic hydrocarbons and Substituted hydrocarbons 4. (a) What do you understand by bioremediation? Discuss its potential and limitations in the treatment of heavy metal contamination. (8) (b) List the steps involved in using plants or microbes for environmental remediation and mention precautions required. (7) 5. (a) Elaborate on the role of microbial transformations in copper extraction. (8) (b) Discuss the relationship between PGPR bacteria and biofertilizers in enhancing soil fertility.