Zoology Optional 2019 Paper UPSC | IAS Paper 1 and Paper 2 Questions | Previous Years Papers (PYQs)

Zoology Optional UPSC IAS 2019 Paper 1

Paper 1 2019 SECTION A

Q.1(a)General characters and classification of Porifera. (IAS 2019/10 Marks)

(b) Metagenesis — Does it differ from alternation of generations? (IAS 2019/10 Marks)

(c)  Parasitic adaptations in Platyhelminthes. (IAS 2019/10 Marks)

(d)  Water Vascular System in Asterias. (IAS 2019/10 Marks)

(e) Connecting link between Reptiles and Aves. (IAS 2019/10 Marks)

Q.2.(a) Give an account of Nutrition in Protozoa. (IAS 2019/20 Marks)

(b) What do you understand about Torsion and Detorsion in Mollusca? Elucidate. (IAS 2019/15 Marks)

(c) Give an account on Types of Skulls in Reptilia with the help of relevant diagrams. (IAS 2019/15 Marks)

Q.3.(a) Write an account on the Social Behavior in Apis and Termites. (IAS 2019/20 Marks)

(b) Describe the external features of Nereis. What is Heteronereis and how does it differ from Nereis? Comment upon Metamerism in Annelida. (IAS 2019/15 Marks)

(c) Define Migration and describe various types of Migration in Fishes with suitable examples. Comment upon its significance. (IAS 2019/15 Marks)

Q.4.(a) Describe the Dentition in Mammals along with relevant diagrams. (IAS 2019/20 Marks)

(b) Define parental care. Give an illustrated account of parental care in Amphibia. (IAS 2019/15 Marks)
(c) Describe urinogenital system in both the sexes of Amniotes with the help of diagrams

only (No description is required). (IAS 2019/15 Marks)

Paper 1 2019 SECTION B

Q.5. Write short notes on the following in about 150 words: (IAS 2019/50 Marks)

(a) Greenhouse effect and its impact on the atmosphere.

(b) Biome.

(c) Pheromones in alarm spreading.

(d)  Elephantiasis. 

(e) Ultracentrifuge.

6.(a) What is Biogeochemical cycle? Discuss in detail the Nitrogen cycle. (IAS 2019/20 Marks)

(b) Explain orientation and navigation with examples in different animals. Add a note on Homing behavior. (IAS 2019/15 Marks)

(c) Write the systemic position of a sugarcane pest. Give an account of its life-cycle and the damage caused by this pest. Write a note on its control measures. (IAS 2019/15 Marks)

Q.7.(a) Through a labelled diagram show the stages of life history of Mulberry silkworm. Explain various aspects of rearing techniques in sericulture and add a note on different diseases of silkworm. (IAS 2019/20 Marks)

(b) What is community ecology? Explain different stratification in biotic community. Add a note on species abundance and species diversity. (IAS 2019/15 Marks)

(c)  Explain the principle and procedure of “ELISA”. Give a note on its application. (IAS 2019/15 Marks)

8.(a) Give an account of causes, consequences, and control of water pollution. Comment on “Ganga action plan”. (IAS 2019/20 Marks)

(b)  What is ANOVA? Differentiate between One-way and Two-way ANOVA. Comment on its application in Biostatistics. (IAS 2019/15 Marks)

(c) Describe different types of social hierarchies in primates. (IAS 2019/15 Marks)

Zoology Optional UPSC IAS 2019 Paper 2

Paper 2 2019 SECTION A

Q.1. Answer the following: (IAS 2019/50 Marks)

(a) What is transcription? Explain the process of transcription in a eukaryote.

(b) Explain the use of ribozyme technology for the treatment of diseases.

(c) What is an artificial chromosome vector? Give its application.

(d) Write a chronological account of human evolution as evidenced by palaeontological records.

(e) Explain the Stanley Miller’s experiment related to origin of life.

Q.2.(a) Differentiate between genomics and proteomics. (IAS 2019/20 Marks)

(b) Explain the isolation and methodology of study of the cell membrane. (IAS 2019/15 Marks)

(c) Explain the biochemical composition of cell membrane. (IAS 2019/15 Marks)

Q.3.(a) Justify the statement, “Linkage and recombination play significant role in the process of inheritance”. (IAS 2019/20 Marks)

(b) Explain that cell cycle is fully based on molecular events. (IAS 2019/15 Marks)

(c)  Delineate the structural and functional characteristics of polytene chromosome. (IAS 2019/15 Marks)

Q.4.(a) Elucidate the process of continental drift and its impacts on animal diversity. (IAS 2019/20 Marks)

(b) Discuss the role of molecular techniques in the study of contemporary systematics. (IAS 2019/15 Marks)

(c)  Sequentially explain the process of apoptosis. (IAS 2019/15 Marks)

Paper 2 2019 SECTION B

Q.5. Write short notes on the following: (IAS 2019/50 Marks)

(a) Watson and Crick model of DNA

(b) Secondary structure of proteins

(c) Structural account of mammalian internal ear

(d) Physiology of action potential

(e) Ontogeny recapitulates phylogeny

Q.6.(a) Define and explain the ‘Michaelis-Menten equation’ and write its significance in enzyme kinetics. (IAS 2019/20 Marks)

(b) Explain the structure and functions of IgG immunoglobulin. (IAS 2019/15 Marks)

(c) Enlist and describe the types and mechanical properties of muscle fibres. (IAS 2019/15 Marks)

Q.7.(a) Give a brief account of tropic hormones which affect the endocrine glands. (IAS 2019/20 Marks)

(b) Tabulate and describe the digestive enzymes, their occurrence, substrates and end products. (IAS 2019/15 Marks)

(c) Make a diagrammatic presentation of Krebs’ cycle. (IAS 2019/15 Marks)

Q.8. (a) Give a brief account of in vitro fertilization (IVF) techniques used for mammals. (IAS 2019/20 Marks)

(b) Explain the structure and functions of haemoglobin. (IAS 2019/15 Marks)

(c) Illustrate the process of development during gastrulation in a chick embryo. (IAS 2019/15 Marks)