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12 previous year questions for Zoology from 3 years. Practice with year-wise breakdown.
12
Questions
3
Years
2
Papers
Write short notes on/Answer the following in about 150 words each:
(a) Metagenesis [10M]
(b) Book lungs [10M]
(c) Paedomorphosis [10M]
(d) Torsion and detorsion in gastropods [10M]
(e) Draw a well-labelled diagram of human eye and write its functions. [10M]
Write on the following in about 150 words each:
(a) Protein sorting in Golgi apparatus [10M]
(b) Structure and function of Lampbrush chromosome [10M]
(c) Symptoms, causes and treatment of thalassemia [10M]
(d) Coupling and repulsion phases of linkage [10M]
(e) Sympatric and allopatric speciation [10M]
Write short notes on the following in about 150 words each:
(a) Biodiversity hot spots [10M]
(b) Navigation in birds [10M]
(c) Sickle cell anaemia [10M]
(d) Circadian rhythms [10M]
(e) Biome [10M]
Write on the following in about 150 words each:
(a) Block to polyspermy [10M]
(b) Fate map of frog embryo [10M]
(c) Activation energy based mechanism of enzyme action [10M]
(d) Structure of dipeptide unit of a protein [10M]
(e) Transmission of nerve impulse through synapse [10M]
Write short notes on the following in about 150 words each :
(a) Concept and organization of Coelom [10M]
(b) Metamorphosis in Insects [10M]
(c) Thyroid gland and its functions [10M]
(d) Hepatic Schizogony [10M]
(e) Aquatic mammals and their adaptations [10M]
Write on the following in about 150 words each :
(a) Polytene chromosome [10M]
(b) Difference between male heterogamety and female heterogamety with examples [10M]
(c) Types of chromosomal aberrations [10M]
(d) Geographic versus reproductive isolation [10M]
(e) Main types of molecular mutations and their effect on phenotype [10M]
Write short notes on the following in about 150 words each :
(a) Food Web [10M]
(b) Biological Rhythms [10M]
(c) AIDS [10M]
(d) Chromosome Painting [10M]
(e) Red Data Book [10M]
Write on the following in about 150 words each :
(a) Functions of immunoglobulins [10M]
(b) ABO system of blood groups and its basis, and erythroblastosis foetalis [10M]
(c) Olfactory pathways and physiology of olfaction [10M]
(d(i)) Gastrulation in frog [5M]
(d(ii)) Biogenetic law [5M]
(e(i)) Stem cells [5M]
(e(ii)) Types of placenta among mammals [5M]
Write short notes on the following in about 150 words each:
(a) Erythrocytic schizogony [10M]
(b) Statocyst of medusa [10M]
(c) Evolutionary status of Onychophora [10M]
(d) Neoteny [10M]
(e) Migration in birds [10M]
Write your answer in about 150 words for each of the following:
(a) Write about different ways by which biodiversity is being threatened. [10M]
(b) How is hn RNA (primary transcript) modified into functional m-RNA in eukaryotes? Explain. [10M]
(c) “Continental drift has resulted in discontinuous distribution of alligators and lungfishes”. Justify. [10M]
(d) Write principle and application of RFLP. [10M]
(e) Describe receptor-mediated endocytosis (RME) along with its advantage. [10M]
Write short notes on the following in about 150 words each:
(a) Ecological niche [10M]
(b) Instinct behaviour in animals [10M]
(c) Pathogenesis of cholera [10M]
(d) Amniocentesis [10M]
(e) Lotka-Volterra model [10M]
Write your answer in about 150 words for each of the following:
(a) Highlight role of various hormones in the regulation of digestive secretions. [10M]
(b) Describe the balance sheet of ATP production in glycolysis. [10M]
(c) Write a note on acrosome reaction during fertilization. [10M]
(d) List different neurotransmitters. Explain the role of specific neurotransmitter across neuromuscular junction. [10M]
(e) Explain competitive and non-competitive enzyme inhibition. [10M]
We have 12 UPSC Mains Zoology optional subject questions spanning 3 years (2023–2025).
Zoology has 2 papers in UPSC Mains: Zoology-I, Zoology-II. Each paper carries 250 marks.