Zoology IFS Paper 2 UPSC 2013 with Solutions

Zoology Optional UPSC Forest Service Paper 2 2013

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SECTION 'A'

1. Answer the following:

Zoology 1(a) Define and explain Mendel's Law of segregation. (IFS 2013, 8 Marks)

Zoology 1(b) Explain the mechanism of fossil formation and the conditions essential for fossilization. (IFS 2013, 8 Marks)

Zoology 1(c) Explain receptor mediated endocytosis and up-take of cholesterol in cells. Draw labelled diagram. (IFS 2013, 8 Marks)

Zoology 1(d) Define cladistics. How will you solve when incongruence arises between cladistics and taxonomic systems. (IFS 2013, 8 Marks)

Zoology 1(e) Explain β-globin gene regulation in humans. (IFS 2013, 8 Marks)

Zoology 2(a) What are G-proteins? Explain their role in signalling pathway. Why is the study of cell signalling important? (IFS 2013, 20 Marks)

Zoology 2(b) Describe the events that occur in a cell during prometaphase and metaphase. Draw labelled diagrams.

Zoology 3(a) What is Transgenesis? Describe the methods employed for the production of transgenic animals. (IFS 2013, 20 Marks)

Zoology 3(b) What is the impact when population upsets genetic equilibrium? Describe in detail the factors responsible for deviation of genetic equilibrium. (IFS 2013, 20 Marks)

Zoology 4(a) Define Natural Selection. Comment on normalizing selection. Mention the salient features of normalizing selection. (IFS 2013, 15 Marks)

Zoology 4(b) What is DNA finger printing? Comment on the applications of DNA finger printing in human Forensic Sciences. (IFS 2013, 15 Marks)

Zoology 4(c) Explain lysosomal disorders in humans. (IFS 2013, 10 Marks)

SECTION 'B'

5. Answer the following in not more than 150 words each.

Zoology 5(a) Contrast the general properties of innate and acquired immune responses. (IFS 2013, 8 Marks)

Zoology 5(b) Differentiate between Amnion and Chorion type of placenta. (IFS 2013, 8 Marks)

Zoology 5(c) Discuss the role of alcohol and chemicals as teratogens. (IFS 2013, 8 Marks)

Zoology 5(d) Explain the chemical formula of a generalized amino acid and show peptide bond formation. (IFS 2013, 8 Marks)

Zoology 5(e) Explain the structural components of Haemoglobin molecule and discuss its role in oxygen transport. (IFS 2013, 8 Marks)

Zoology 6(a) What is blood coagulation? Discuss the factors and mechanism of coagulation. (IFS 2013, 20 Marks)

Zoology 6(b) Explain morphogenetic movements with reference to frog, chick and human embryonic development. Draw labelled diagrams. (IFS 2013, 15 Marks)

Zoology 6(c) Explain the structure and importance of cholesterol. (IFS 2013, 5 Marks)

Zoology 7(a) Draw the basic structure of an immunoglobulin molecule bound to an epitope of an antigen. Label the heavy and light chains. Explain the types of Immunoglobulins. (IFS 2013, 20 Marks)

Zoology 7(b) Discuss the factors for male and female infertility and describe the details of IVF methods currently used. (IFS 2013, 20 Marks)

Zoology 8(a) Give an account of male and female sex hormones with reference to humans and discuss their role in reproduction. Mention the interplay of pituitary secretions. (IFS 2013, 20 Marks)

Zoology 8(b) Explain the structure of cyclic AMP. How is it formed? Why is it called second messenger? With a labelled diagram, explain its role in glucose metabolism in a liver cell. (IFS 2013, 20 Marks)