Molecules of Life — DU Physical Science courses pertaining to Chemistry Previous Year Question Papers

All questions have equal marks. a) What happens when glucose reacts with: Bromine water HI in presence of red phosphorus conc. sulfuric acid b) Describe the determination of primary structure of proteins using Edman degradation method. c) What are primary and secondary structure of a nucleic acid? a) i) Draw Haworth projection formula of lactose and maltose. ii) Mention the linkage and anomeric carbon in each case. ili) Which of the two sugars is a reducing sugar? b) Explain Merrifield solid phase peptide synthesis. Discuss its advantages over solution phase synthesis. c) How do changes in substrate concentration and temperature affect the enzyme activity? 5. a) What are anomers and epimers? Explain with relevant examples. b) i) Name the only asymmetric amino acid with its structure. ii) Give one example each of sulphur and hydroxyl group containing amino acid with their structures. ili) What do you mean by denaturation of proteins? c) What are the fundamental components of a nucleotide? Discuss in detail. 6. Write short note on any three of the following: a) Starch and cellulose Primary, secondary, tertiary and quaternary structure of proteins