Zoology Optional 2022 Paper UPSC | IFS Indian Forest Services Paper 1 and Paper 2 Questions | Previous Years Papers (PYQs)

Zoology Optional UPSC Forest Service Paper 1 2022

Paper 1 2022 SECTION A

1. Write a brief account on each of the following:

1(a) Statocysts of Medusa (IFS 2022/8 Marks)

1(b) Erythrocytic Schizogony (IFS 2022/8 Marks)

1(c) Canal System in Sponges (IFS 2022/8 Marks)

1(d) Origin of Tetrapods (IFS 2022/8 Marks)

1(e) Flight adaptations in Birds (IFS 2022/8 Marks)

2(a) Define conjugation. Diagrammatically explain the mechanism of conjugation in Paramecium. (IFS 2022/15 Marks)

2(b) What is metagenesis? Explain metagenesis with reference to the life cycle of Obelia. (IFS 2022/15 Marks)

2(c) Give an illustrated account of life history of Branchiostoma. (IFS 2022/10 Marks)

3(a) Explain the structural organisation of adrenal gland in mammals Describe its hormones and their functions. (IFS 2022/15 Marks)

3(b) Define metamorphosis. Explain the hormonal control of metamorphosis in insects. (IFS 2022/15 Marks)

3(c) Describe the structure and phylogenetic significance of Trochophore larva. (IFS 2022/10 Marks)

4(a) What are coral reefs ? Describe the formation and types of coral reefs found all over the world. (IFS 2022/15 Marks)

4(b) Describe the structure of human eye. Explain the mechanism of vision in humans. (IFS 2022/15 Marks)

4(c) Describe the water vascular system of Asterias. (IFS 2022/10 Marks)

Paper 1 2022 SECTION B

5. Write a brief account on each of the following:

5(a) Biological clock and its significance (IFS 2022/8 Marks)

5(b) Smallpox causes and pathogenicity (IFS 2022/8 Marks)

5(c) Ecotones and edge effect (IFS 2022/8 Marks)

5(d) Courtship behaviour in birds (IFS 2022/8 Marks)

5(e) "Forests are an important natural resource." Comment (IFS 2022/8 Marks)

6(a) Describe the phenomenon of learning, instinct and imprinting in animals, with suitable examples. (IFS 2022/15 Marks)

6(b) What is Sericulture? Describe its methods and significance. Also add a note on silkworm diseases. (IFS 2022/15 Marks)

6(c) Differentiate between SEM and TEM. (IFS 2022/10 Marks)

7(a) What is Pollution? Explain the sources, impacts and preventive measures of noise pollution. (IFS 2022/15 Marks)

7(b) Name the causative organism and vector of plague. Explain its pathogenesis and its control measures (IFS 2022/15 Marks)

7(c) Discuss the role of ticks and mites in cattle and livestock diseases. (IFS 2022/10 Marks)

8(a) What is Integrated Pest Management? Describe the different strategies of integrated pest management employed in agriculture. (IFS 2022/15 Marks)

8(b) Describe the principle, working and applications of Scintillation counter. (IFS 2022/15 Marks)

8(c) Describe null hypothesis in context to chi-square analysis. (IFS 2022/10 Marks)

Zoology Optional UPSC Forest Service Paper 2 2022

Paper 2 2022 SECTION A

1. (a) Explain the process of protein glycosylation in the lumen of rough endoplasmic reticulum. (IFS 2022, 8 Marks)

(b) How does lactose induce lac operon? Explain. (IFS 2022, 8 Marks)

(c) How are fossils formed? Describe the methods of dating of fossils. (IFS 2022, 8 Marks)

(d) With the help of a diagram, explain the constitution of a cosmid and mention its advantages over a plasmid in recombinant technology. (IFS 2022, 8 Marks)

(e) Describe the ultrastructure of nuclear pore and its functions. (IFS 2022, 8 Marks)

2. (a) Describe the constitution of a basic transcription unit and the process of initiation of transcription in prokaryotes. (IFS 2022, 15 Marks)

(b) With suitable example, explain the concept of multiple allelism. (IFS 2022, 15 Marks)

(c) Explain the data required for holotype labelling. Add a note on lectotype and neotype designation. (IFS 2022, 10 Marks)

3. (a) Describe the mechanism of evolution by natural selection. (IFS 2022, 15 Marks)

(b) What is meant by genetic dictionary? Explain the concept of degeneracy of genetic code. (IFS 2022, 15 Marks)

(c) Describe the steps of DNA synthesis occurring on lagging strand of DNA. (IFS 2022, 10 Marks)

4. (a) Explain Urey and Miller experiment. Give its contribution in the development of modern concept of origin of life. (IFS 2022, 15 Marks)

(b) With suitable examples, explain the role of Golgi cisternae in protein sorting mechanism. (IFS 2022, 15 Marks)

(c) What do you mean by a genetic clone? Describe a protocol of cloning of a recombinant DNA. (IFS 2022, 10 Marks)

Paper 2 2022 SECTION B

5. (a) What do you mean by programmed cell death? Highlight its role in the metamorphosis of tadpole larva into adult frog. (IFS 2022, 8 Marks)

(b) Explain activation energy-based mechanism of enzyme catalysis. (IFS 2022, 8 Marks)

(c) Describe the role of haemoglobin in the transport of carbon dioxide in human body. (IFS 2022, 8 Marks)

(d) Illustrate the structure of a dipeptide and mention the characteristics of the peptide bond. (IFS 2022, 8 Marks)

(e) How does internal ear control body balance? Explain. (IFS 2022, 8 Marks)

6. (a) Differentiate between simple and complex lipids. Highlight the cellular importance of phospholipids. (IFS 2022, 15 Marks)

(b) What is meant by fate map? Describe the designing of fate map of gastrula in frog. How does it differ from that in chick? (IFS 2022, 15 Marks)

(c) Describe the role of kidneys in acid-base regulation. (IFS 2022, 10 Marks)

7. (a) Explain the roles of helper and cytotoxic T-cells in immunity. (IFS 2022, 15 Marks)

(b) Describe the development of eye in mammals. (IFS 2022, 15 Marks)

(c) Comment on the source of energy during muscle contraction under normal and intensive exercise conditions. (IFS 2022, 10 Marks)

8. (a) Highlight the mechanism of nerve conduction across a synapse with respect to excitatory neurotransmitter. (IFS 2022, 15 Marks)

(b) (i) Explain ATP utilizing reactions of glycolytic pathway. (IFS 2022, 5 Marks)

(ii) Write NADH and FADH, producing reactions of Krebs cycle. (IFS 2022, 10 Marks)

(c) Describe in detail the hormonal regulation of oocyte maturation and ovulation in human females. (IFS 2022, 10 Marks)