UPSC Zoology 2023

Write short notes on the following in about 150 words each: (a) Erythrocytic schizogony (10 marks) (b) Statocyst of medusa (10 marks) (c) Evolutionary status of Onychophora (10 ma…

(a) Define conjugation. Explain the mechanism of conjugation in Paramecium. Also give its significance. (20 marks) (b) Describe the different stages of life cycle of leech with th…

(a) Explain the general features, life cycle and pathogenicity of Taenia. (20 marks) (b) Give an illustrated account of origin of mammals. (15 marks) (c) Describe the perivisceral…

(a) Draw a well-labelled diagram of adrenal gland and discuss the functions of its hormones. (20 marks) (b) Describe the general features and life cycle of Ascaris. (15 marks) (c)…

Write short notes on the following in about 150 words each: (a) Ecological niche (10 marks) (b) Instinct behaviour in animals (10 marks) (c) Pathogenesis of cholera (10 marks) (d)…

(a) Define regression. Explain different methods and applications of regression analysis. (20 marks) (b) Define food chain. Describe different types of food chain with suitable ex…

(a) What is lac culture? Explain the life cycle of lac insect and describe cultivation and processing of lac in India. Also add a note on its economic importance. (20 marks) (b) W…

(a) What is ELISA? Explain the principle, types, procedure and applications of ELISA. (20 marks) (b) Describe the symptoms, diagnosis, treatment and preventive measures of livesto…

Write your answer in about 150 words for each of the following: (a) Write about different ways by which biodiversity is being threatened. (10 marks) (b) How is hn RNA (primary tra…

(a) Give structure of t-RNA. Write role of different RNAs in the translation process. (20 marks) (b) Describe the principle and method of whole animal cloning. (15 marks) (c) Expl…

(a) Describe the structure of mitochondrion. Why is it known as powerhouse of the cell? (20 marks) (b) Explain the mechanism of sex determination in human beings. (15 marks) (c) D…

(a) Explain the following: (10×2=20 marks) (i) Haemophilia (ii) Red-green colour blindness (b) Describe various stages of prophase of meiosis-I in an animal cell. (15 marks) (c) E…

Write your answer in about 150 words for each of the following: (a) Highlight role of various hormones in the regulation of digestive secretions. (10 marks) (b) Describe the balan…

(a) Classify carbohydrates by giving suitable examples. Also, mention characteristics of each category. (20 marks) (b) Explain the structure of haemoglobin and its role in carbon…

(a) Give an account of hormonal regulation of menstruation in human females. (20 marks) (b) Explain the source(s) and functions of the following: (5×3=15 marks) (i) Vitamin B₁ (ii…

(a) Explain enzymes, their characteristics as well as induced-fit model of mechanism of enzyme action. (20 marks) (b) List various coagulation factors and describe their role in b…