Zoology IAS Paper 2 UPSC 2023 with Solutions

Zoology Paper 2 UPSC 2023 - Question Paper with Solutions 

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Section - A

1. Write your answer in about 15 Marks0 words for each of the following:

Zoology 1a Write about different ways by which biodiversity is being threatened. (IAS 2023/10 Marks)

Zoology 1b How is he RNA (primary transcript) modified into functional m-RNA in eukaryotes? Explain. (IAS 2023/10 Marks)

Zoology 1c "Continental drift has resulted in discontinuous distribution of alligators and lungfishes". Justify. (IAS 2023/10 Marks)

Zoology 1d Write principle and application of RFLP. (IAS 2023/10 Marks)

Zoology 1e Describe receptor-mediated endocytosis (RME) along with its advantage.( IAS 2023/10 Marks)

Zoology 2a Give structure of t-RNA. Write role of different RNAs in the translation process. (IAS 2023/20 Marks)

Zoology 2b Describe the principle and method of whole animal cloning. 9IAS 2023/15 Marks Marks)

Zoology 2c Explain Stanley Miller experiment. In which way, it provided support to most acceptable theory of origin of life? (IAS 2023/15 Marks)

Zoology 3a Describe the structure of mitochondrion. Why is it known as powerhouse of the cell? (IAS 2023/20 Marks)

Zoology 3b Explain the mechanism of sex determination in human beings. (IAS 2023/15 Marks Marks)

Zoology 3c Describe various means which result in change in gene frequencies in a population. (IAS 2023/15 Marks)

Zoology 4a Explain the following: 

Zoology 4a i Haemophilia (IAS 2023/10 Marks)

Zoology 4a ii Red-green colour blindness (IAS 2023/10 Marks)

Zoology 4b Describe various stages of prophase of meiosis-I in an animal cell. (IAS 2023/15 Marks)

Zoology 4c Explain phenomenon of natural selection taking examples of peppered moth and sickle cell anaemia. (IAS 2023/15 Marks)

Section - B

5. Write your answer in about 150 words for each of the following:

Zoology 5a Highlight role of various hormones in the regulation of digestive secretions (IAS 2023/10 Marks)

Zoology 5b Describe the balance sheet of ATP production in glycolysis. (IAS 2023/10 Marks)

Zoology 5c Write a note on acrosome reaction during fertilization. (IAS 2023/10 Marks)

Zoology 5d List different neurotransmitters. Explain the role of specific neurotransmitter across neuromuscular junction. (IAS 2023/10 Marks)

Zoology 5e Explain competitive and non-competitive enzyme inhibition. (IAS 2023/10 Marks)

Zoology 6a Classify carbohydrates by giving suitable examples. Also, mention characteristics of each category. (IAS 2023/20 Marks)

Zoology 6b Explain the structure of haemoglobin and its role in carbon dioxide transport. (IAS 2023/15 Marks)

Zoology 6c Describe various techniques of in vitro fertilization. (IAS 2023/15 Marks)

Zoology 7a Give an account of hormonal regulation of menstruation in human females. (IAS 2023/20 Marks)

Zoology 7b Explain the source(s) and functions of the following:

Zoology 7b i VitaminB1 (IAS 2023/5 Marks)

Zoology 7b ii Vitamin B2 (IAS 2023/5 Marks)

Zoology 7b iii Vitamin B12 (IAS 2023/5 Marks)

Zoology 7c Write in detail three phases of oogenesis in human females. (IAS 2023/15 Marks)

Zoology 8a Explain enzymes, their characteristics as well as induced-fit model of mechanism of enzyme action. (IAS 2023/20 Marks)

Zoology 8b List various coagulation factors and describe their role in blood clotting. (IAS 2023/15 Marks)

Zoology 8c Explain neoteny phenomenon taking suitable example. How is it different from paedogenesis? (IAS 2023/15 Marks Marks)