Zoology IAS Paper 2 UPSC 2018 with Solutions

Zoology Paper 2 UPSC 2018 - Question Paper with Solutions 

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SECTION-A

Zoology 1a What are Euchromatin and Heterochromatin? Explain the events of Heterochromatin formation. (IAS 2018/10 Marks)

Zoology 1b What are fossils? Describe the process of fossil formation and give two methods of determining the age of fossils. (IAS 2018/10 Marks)

Zoology 1c Describe the traditional methods of classification of animals. (IAS 2018/10 Marks)

Zoology 1d Explain the use of VNTRs in DNA fingerprinting in paternity tests. (IAS 2018/10 Marks)

Zoology 1e Explain the origin and functions of lysosomes with emphasis on different enzymes. (IAS 2018/10 Marks)

Zoology 2a Describe the role of protein kinases in the regulation of cell cycle. Add a note on the importance of check points. (IAS 2018/20 Marks)

Zoology 2b Comment on the following human genetic disorders: i Down Syndrome. ii Klinefelter's Syndrome. iii Sickle Cell Anaemia. (IAS 2018/15 Marks)

Zoology 2c With suitable examples, describe how adaptive radiation helps in the evolution of terrestrial and aquatic animal groups. (IAS 2018/15 Marks)

Zoology 3a Describe the structure of plasma membrane according to the fluid mosaic model with emphasis on the role of lipid molecules in maintaining the fluidity of the membrane. (IAS 2018/20 Marks)

Zoology 3b What are micro, macro and mega evolutions? Explain the terms with suitable examples. (IAS 2018/15 Marks)

Zoology 3c Explain the distinctive features of plasmid and cosmid vectors used in recombinant DNA technology. (IAS 2018/15 Marks)

Zoology 4a Define Isolation. Explain in detail the pre-mating and post-mating isolating mechanisms. (IAS 2018/20 Marks)

Zoology 4b Explain in detail about the events involved in the transformation of spermatid into sperm. Comment on why you consider these changes as essential. (IAS 2018/15 Marks)

Zoology 4c Explain the phenomenon of X-linked inheritance in Drosophila. (IAS 2018/15 Marks)

SECTION-B

Zoology 5a Describe the role of Acetylcholine in neuromuscular transmission. (IAS 2018/10 Marks)

Zoology 5b Describe the role of fertilizin and anti-fertilizin interactions during fertilization. (IAS 2018/10 Marks)

Zoology 5c Define Muscle twitch and explain the features of Summation and Tetanus. (IAS 2018/10 Marks)

Zoology 5d Explain the role of pancreatic enzymes in digestion. (IAS 2018/10 Marks)

Zoology 5e Who proposed Binomial Nomenclature? Describe the rules of Zoological Nomenclature. (IAS 2018/10 Marks)

Zoology 6a Describe the role of pituitary and gonadal hormones on puberty and regulation of menstrual cycle. (IAS 2018/20 Marks)

Zoology 6b Describe the role of visual pigments in daylight and night vision. (IAS 2018/15 Marks)

Zoology 6c With particular reference to Gradient theory, describe how polarity is established during embryonic development. Comment on its significance. (IAS 2018/15 Marks)

Zoology 7a Describe in detail about the respiratory chain or electron transport during oxidative phosphorylation in Mitochondria. (IAS 2018/20 Marks)

Zoology 7b Give an account of the impact of drugs on teratogenesis. (IAS 2018/15 Marks)

Zoology 7c What are fate maps? Describe the methods of fate maps construction with reference to frog or chick. (IAS 2018/15 Marks)

Zoology 8a Describe the role of Calcitonin, Parathormone and Vitamin D3 in calcium metabolism. (IAS 2018/20 Marks)

Zoology 8b Describe in detail about the structure and function of Nephron and explain fluid balance regulation through Renin-Angiotensin-Aldosterone systems. (IAS 2018/15 Marks)

Zoology 8c Give an account of the morphological and histological types of placenta. Add a note on the physiological function of mammalian placenta. (IAS 2018/15 Marks)