Zoology IFS Paper 2 UPSC 2018 with Solutions
In this article, all questions of Zoology Optional Paper 2 are answered. Click on the question links to view the answers.
This article is part of Synopsis IAS Zoology Optional Course for UPSC IFS.
Zoology Optional UPSC Forest Service Paper 2 2018
Click on the links for the solutions
SECTION-A
Zoology 1(a) Explain the role of endoplasmic reticulum in lipid biosynthesis. (IFS 2018, 8 Marks)
Zoology 1(b) Explain the types of transposons with a note on any two transposition events. (IFS 2018, 8 Marks)
Zoology 1(c) Describe the different types of vectors. (IFS 2018, 8 Marks)
Zoology 1(d) Explain how mimicry helps animals to lead a successful life. (IFS 2018, 8 Marks)
Zoology 1(e) Discuss the various types of zoological nomenclature with suitable examples. (IFS 2018, 8 Marks)
Zoology 2(a) Discuss the application of pedigree analysis in identifying diseases. (IFS 2018, 15 Marks)
Zoology 2(b) What are lysosomes? Discuss their role in intracellular digestion. Give an example of lysosomal storage disorder. (IFS 2018, 15 Marks)
Zoology 2(c) Describe the steps involved in gene regulation in eukaryotes. (IFS 2018, 10 Marks)
Zoology 3(a) With a neatly labelled diagram, explain sodium-potassium pump and its role in membrane transport. (IFS 2018, 10 Marks)
Zoology 3(b) Explain the mode of speciation in evolution with examples. (IFS 2018, 15 Marks)
Zoology 3(c) Explain how protein synthesis is the key to the expression of biological information. (IFS 2018, 15 Marks)
Zoology 4(a) Explain how unknown five-toed Condylarthra evolved in Equus. State the evolutionary pattern in each geological era. (IFS 2018, 10 Marks)
Zoology 4(b) Discuss the structure and functions of Ribosomes and Golgi bodies with an emphasis on secretion of proteins. (IFS 2018, 15 Marks)
Zoology 4(c) Describe the mechanism of DNA replication. (IFS 2018, 15 Marks)
SECTION B
Zoology 5(a) Explain enzyme kinetics with suitable examples. (IFS 2018, 8 Marks)
Zoology 5Explain how the biological energy transformations obey the laws of thermodynamics. (IFS 2018, 8 Marks)
Zoology 5(c) Explain the extrinsic pathway for initiation of blood clotting. (IFS 2018, 8 Marks)
Zoology 5(d) Describe the respiratory regulation of acid-base balance in body fluids. (IFS 2018, 8 Marks)
Zoology 5(e) What is neoteny? Discuss the phenomenon in Amphibia giving suitable example. (IFS 2018, 8 Marks)
Zoology 6(a) Draw the structure of cAMP. Explain how cAMP acts as second messenger for B-adrenergic receptor system. (IFS 2018, 15 Marks)
Zoology 6(b) Describe the molecular mechanism of skeletal muscle contraction. (IFS 2018, 10 Marks)
Zoology 6(c) Define cloning. Explain somatic cell nuclear transfer method with suitable examples. (IFS 2018, 15 Marks)
Zoology 7(a) Discuss the transport of oxygen in the blood. Give an account of various factors that shift oxygen-hemoglobin dissociation curve. (IFS 2018, 15 Marks)
Zoology 7(b) Explain enzyme specificity with suitable examples. How is enzyme activity controlled? (IFS 2018, 15 Marks)
Zoology 7(c) Describe the process of metamorphosis in frogs and explain the role of thyroxin. (IFS 2018, 10 Marks)
Zoology 8(a) What is embryonic induction? Describe the mechanism of induction giving examples. (IFS 2018, 15 Marks)
Zoology 8(b) Enlist the composition of bile. Discuss the role of bile salts in fat digestion and absorption. (IFS 2018, 15 Marks)
Zoology 8(c) What is immunity? Giving suitable examples explain humoral and cell mediated immunity. (IFS 2018, 10 Marks)