Zoology IAS Paper 2 UPSC 2021 with Solutions

Zoology Paper 2 UPSC 2021 - Question Paper with Solutions 

Click on the links for the solutions

Section - A

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

Zoology 1a Describe the requirement of proteins for the initiation of transcription in an eukaryote. (IAS 2021/10 Marks)

Zoology 1b What is modern concept of gene? Describe the test of allilism with suitable example. (IAS 2021/10 Marks) 

Zoology 1c Define mimicry. Discuss the types of mimicry with suitable examples. (IAS 2021/10 Marks)

Zoology 1d Describe the use of molecular techniques in animal taxonomy. (IAS 2021/10 Marks)

Zoology 1e What is cladistics? Discuss the international code of biological nomenclature. (IAS 2021/10 Marks)

Zoology 2a What is cell cycle? Draw an overview of molecular events during cell cycle. Discuss the role of protein kinases in the regulation of meiotic cell cycle. (IAS 2021/20 Marks)

Zoology 2b Lysosomes are polymorphic, justify, Draw a diagram representing the dynamic aspect of lysosome system. Write down the functions of lysosomes. (IAS 2021/15 Marks Marks)

Zoology 2c Glycoproteins are asymmetrically distributed in a plasma membrane, explain. Give an overview of membrane function (IAS 2021/15 Marks Marks)

Zoology 3a What is chromosome mutation? Describe various types of polyploidy with suitable examples. Add a note on phenotypic effects of polyploidy. (IAS 2021/20 Marks)

Zoology 3b What is chromosome theory of linkage? Describe the methods for determination of linkage using suitable examples. (IAS 2021/15 Marks)

Zoology 3c What is Mendel's dihybrid cross? Discuss the mechanism of independent assortment using suitable example. (IAS 2021/15 Marks Marks)

Zoology 4a What is isolation? Describe the major isolating mechanisms which lead to speciation. (IAS 2021/20 Marks)

Zoology 4b Enlist theories of origin of life. Explain the theory of biochemical evolution proposed by Oparin and Haldane. (IAS 2021/15 Marks Marks)

Zoology 4c What is fossil data? Discuss the chronological order of human evolution with suitable examples. (IAS 2021/15 Marks Marks)

Section – B

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

Zoology 5a Fatty acids regulate the nature of lipids, justify  (IAS 2021/10 Marks)

Zoology 5b Define coenzyme. Explain the role of coenzymes in the regulation of metabolic reactions by giving suitable examples. (IAS 2021/10 Marks)

Zoology 5c Explain the respiratory regulation of acid-base balance. (IAS 2021/10 Marks)

Zoology 5d Describe the rapidly acting synaptic transmitters with suitable examples. (IAS 2021/10 Marks)

Zoology 5e What is sperm capacitation? Describe the method of mammalian sperm capacitation in vitro. (IAS 2021/10 Marks)

Zoology 6a What are peptide hormones? With the help of schematic diagram, discuss the epinephrine cascade for the glucose release from hepatocytes. (IAS 2021/20 Marks)

Zoology 6b Cyclic AMP is a second messenger, justify. Discuss the importance of cyclic AMP in intracellular signal transduction with suitable example. (IAS 2021/15 Marks Marks)

Zoology 6c What is bioenergetics? Discuss the role of second law of thermodynamics in energy transduction. (IAS 2021/15 Marks)

Zoology 7a Explain the basic stimuli causing pancreatic secretion. Discuss the role of pancreas in major food digestion. (IAS 2021/20 Marks)

Zoology 7b Explain the transport of oxygen in blood. Discuss the factors that shift oxygen-hemoglobin dissociation curve. (IAS 2021/15 Marks)

Zoology 7c Describe the functional anatomy of cochlea with suitable diagram. Write down the functions of organ of corti. (IAS 2021/15 Marks Marks)

Zoology 8a What are morphogens? Describe the cellular differentiation during morphogenesis. (IAS 2021/20 Marks)

Zoology 8b What are gap junction proteins? Discuss the roles of connexins in cellular interaction. (IAS 2021/15 Marks)

Zoology 8c What is primordial germ cell? With the help of suitable diagram, discuss the process of oogenesis. (IAS 2021/15 Marks)