Fundamentals of Molecular Biology — DU B.Sc. (Hons.) Botany Previous Year Question Papers

(i) Heterochromatin and euchromatin (iv) Leading and lagging strand 4. (a) Explain the comparative mechanism of translation in prokaryotes and eukaryotes. (b) What is operon system? Explain in detail about the lac operon with well labeled diagrams. (8) 5. (a) Describe Meselson-Stahl experiment in detail and discuss the result produced from this experiment. (b) Discuss in detail the post-transcriptional processing of pre-mRNA in eukaryotes. 6. (a) Explain in detail about the structure of tRNA and mention its significant roles in the process of translation. (8) (b) What are the key enzymes involved in replication? Explain the mechanisms and roles of each enzyme. 2. Attempt four questions in all, including Question 4. All parts of a question must be answered together. 1. (a) Define the following (any five) : (1x5=5) (ii) Reverse Transcription (iv) Okazaki fragment (vil) Chromatin (b) Match the following : (1x5=5) (il) Jacob and Monod (b) DNA is the genetic material (i) Fredrich Miescher (o) Cracked the genetic code (iv) Hershey and Chase (d) Nuclein (iv) Avery, Macleoid (e) Transforming and McCarty principle of DNA (c) Fill in the blanks: (1x5=5) (i) — • is known as initiation codon. (ii) — is the example of repressible operon. (iii) Z-DNA is the example of handed DNA (iv) — and._ _ are the two types of nitrogenous base in DNA structure. (v) — - enzyme unwind the double stranded DNA into single stranded. 2. Write short note on the following (any three) : (i) Central Dogma (ii) Watson and Crick's model of DNA (iv) Rolling circle replication (v) Inhibitors of protein synthesis. 3. Write difference between the following (any three)