Zoology IAS Paper 2 UPSC 2020 with Solutions

Zoology Paper 2 UPSC 2020 - Question Paper with Solutions 

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SECTION-A

Zoology 1a What is Wobble hypothesis? How does it explain degeneracy in genetic code? (IAS 2020/10 Marks)

Zoology 1b Describe the mechanism of sex determination in Drosophila. (IAS 2020/10 Marks)

Zoology 1c Differentiate between sympatric and parapatric speciation with suitable examples. (IAS 2020/10 Marks)

Zoology 1d Describe the origin of code for zoological nomenclature. (IAS 2020/10 Marks)

Zoology 1e Describe the sequence specific DNA binding proteins. (IAS 2020/10 Marks)

Zoology 2a Draw an overview of eukaryotic cell cycle. Describe the roles of cyclins in the regulation of cell cycle. (IAS 2020/20 Marks)

Zoology 2b What is transgenesis? Describe the methods for gene transfer in animals and its applications. (IAS 2020/15 Marks)

Zoology 2c Define paleontology. Discuss the chronological order of elephant evolution. (IAS 2020/15 Marks)

Zoology 3a Define mutation. Describe the types, causes and applications of mutations. (IAS 2020/20 Marks)

Zoology 3b What is nucleosome? Explain the functional elements of eukaryotic chromosomes. (IAS 2020/15 Marks)

Zoology 3c What is RAPD? Give an account of the general methods for mapping human genome.(IAS 2020/15 Marks)

Zoology 4a What is Hardy-Weinberg equilibrium? Describe the principles, mechanism and its applications in population genetics. (IAS 2020/20 Marks)

Zoology 4b Draw an ultrastructure of plasma membrane. Discuss the roles of lipids in the regulation of membrane fluidity. (IAS 2020/15 Marks)

Zoology 4c Explain biodiversity. Discuss different grades and factors affecting the distribution of animal biodiversity. (IAS 2020/15 Marks)

SECTION-B

Zoology 5a Describe the basic structure and functions of immunoglobulins. (IAS 2020/10 Marks)

Zoology 5b Draw a typical neuron action potential. Discuss the ionic basis for the propagation of nerve impulse. (IAS 2020/10 Marks)

Zoology 5c Enlist the composition of saliva. Describe the mechanism of secretion of saliva. (IAS 2020/10 Marks)

Zoology 5d Give a schematic representation of differentiation of sexual phenotypes during early embryonic development in mammals. (IAS 2020/10 Marks)

Zoology 5e "Calcium is an initiator of cortical granules reaction." Explain. (IAS 2020/10 Marks)

Zoology 6a Define oxidative phosphorylation. Describe the therories of mechanism of ATP synthesis. (IAS 2020/20 Marks)

Zoology 6b What is the general mechanism of blood coagulation? Describe the intrinsic pathway for the initiation of blood clotting. (IAS 2020/15 Marks)

Zoology 6c What are embryonic stem cells? Discuss the isolation, differentiation and therapeutic applications of embryonic stem cells. (IAS 2020/15 Marks)

Zoology 7a Enlist the sources of energy for muscle contraction. Describe the mechanism of contraction of skeletal muscle. (IAS 2020/20 Marks)

Zoology 7b "Glycolysis is considered as metabolic hub." Justify. (IAS 2020/15 Marks)

Zoology 7c What is metamorphosis? Explain the role of thyroxine in the regulation of amphibian metamorphosis. (IAS 2020/15 Marks)

Zoology 8a Define programmed cell death. Explain the molecular mechanism and significance of apoptosis during early embryonic development. (IAS 2020/20 Marks)

Zoology 8b What are vitamins? Describe the types and biological roles of fat-soluble vitamins. (IAS 2020/15 Marks)

Zoology 8c Describe the process of glomerular filtration. Discuss the determinants of glomerular filtration rate in human. (IAS 2020/15 Marks)