Zoology IFS Paper 2 UPSC 2015 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 2015
Click on the links for the solutions
SECTION-A
1. Write a relative account of each of the following:
Zoology 1(a) Transport of small and large molecules across plasma membrane. (IFS 2015, 8 Marks)
Zoology 1(b) Euploidy and Polyploidy. (IFS 2015, 8 Marks)
Zoology 1(c) Homology and Analogy. (IFS 2015, 8 Marks)
Zoology 1(d) Palearctic and Nearctic regions. (IFS 2015, 8 Marks)
Zoology 1(e) Plasmids and Cosmids. (IFS 2015, 8 Marks)
Zoology 2(a) Describe the ultrastructure of mitochondrion and explain why it is considered as a symbiotic cell organelle. (IFS 2015, 20 Marks)
Zoology 2(b) What is Transcription? Explain the initiation complex and the events leading to the formation of mRNA in eukaryotes. (IFS 2015, 20 Marks)
Zoology 3(a) What is signal transduction? With a labelled diagram, explain the steps involved. (IFS 2015, 20 Marks)
Zoology 3(b) Discuss the role of various isolating mechanisms in speciation. (IFS 2015, 20 Marks)
Zoology 4(a) Give a historical account of naming an animal species and the validity of binominal system, adding a note on the role of International Code of Zoological Nomenclature (ICZN). (IFS 2015, 20 Marks)
Zoology 4(b) What is continental drift? When did it occur and what are its evidences? (IFS 2015, 20 Marks)
SECTION B
5. Write notes on each of the following:
Zoology 5(a) Role of actin and myosin in muscle contraction. (IFS 2015, 8 Marks)
Zoology 5(b) Types of placenta. (IFS 2015, 8 Marks)
Zoology 5(c) Embryo transfer. (IFS 2015, 8 Marks)
Zoology 5(d) Cyclic AMP. (IFS 2015, 8 Marks)
Zoology 5(e) Ultrafiltration in mammalian kidney. (IFS 2015, 8 Marks)
Zoology 6(a) Explain what initiates the process of blood coagulation and discuss the role of different factors. (IFS 2015, 20 Marks)
Zoology 6(b) Describe the complexity of inner ear and its mechanism of hearing. (IFS 2015, 20 Marks)
Zoology 7(a) Give an account of the structural and functional characteristics of IgE and IgM immunoglobulins. (IFS 2015, 20 Marks)
Zoology 7(b) What is oxidative phosphorylation? Describe the steps involved in the process and add a note on the role of enzymes at every step, with a schematic diagram. (IFS 2015, 20 Marks)
Zoology 8(a) Explain the process of regeneration giving suitable examples from vertebrates. (IFS 2015, 20 Marks)
Zoology 8(b) Describe the fate map of gastrula with reference to frog. (IFS 2015, 20 Marks)