(Download) UPSC MAIN EXAM : 2019 - Zoology (Paper-2)

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(Download) CS (MAIN) EXAM : 2019 ZOOLOGY (Paper 2)

SECTION ‘A’

Q1. Answer the following : 10X5=50 marks

(a) What is transcription? Explain the process of transcription in a eukaryote.  10 marks
(b) Explain the use of ribozyme technology for the treatment of diseases.  10 marks
(c) What is an artificial chromosome vector? Give its application. 10 marks
(d) Write a chronological account of human evolution as evidenced by palaeontological records.  10 marks
(e) Explain the Stanley Miller's experiment related to origin of life.  10 marks

2. (a) Differentiate between genomics and proteomics. 20 marks
(b) Explain the isolation and methodology of study of the cell membrane. 15 marks
(c) Explain the biochemical composition of cell membrane. 15 marks

3. (a) Justify the statement, “Linkage and recombination play significant role in the process of inheritance".20 marks
(b) Explain that cell cycle is fully based on molecular events. 15 marks
(c) Delineate the structural and functional characteristics of polytene chromosome. 15 marks

4. (a) Elucidate the process of continental drift and its impacts on animal diversity. 20 marks
(b) Discuss the role of molecular techniques in the study of contemporary systematics. 15 marks
(c) Sequentially explain the process of apoptosis. 15 marks

SECTION 'B'

Q5. Write notes on the following in about 150 words each: 10x5=50 marks

(a) Watson and Crick model of DNA .  10 marks
(b) Secondary structure of proteins .  10 marks
(c) Structural account of mammalian internal ear .  10 marks
(d) Physiology of action potential .  10 marks
(e) Ontogeny recapitulates phylogeny .  10 marks

6. (a) Define and explain the 'Michaelis-Menten equation', and write its significance in enzyme kinetics. 20 marks
(b) Explain the structure and functions of IgG immunoglobulin. 15 marks
(c) Enlist and describe the types and mechanical properties of muscle fibres. 15 marks

7. (a) Give a brief account of tropic hormones which affect the endocrine glands. 20 marks
(b) Tabulate and describe the digestive enzymes, their occurrence, substrates and end products. 15 marks
(c) Make a diagrammatic presentation of Krebs' cycle. 15 marks

8. (a) Give a brief account of in vitro fertilization (IVF) techniques used for mammals.20 marks
(b) Explain the structure and functions of haemoglobin. 15 marks
(c) Illustrate the process of development during gastrulation in a chick embryo. 15 marks