1Medium10 marks
Draw a typical neuron action potential. Discuss the ionic basis for the propagation of nerve impulse.
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55 questions from the UPSC 2020 examination.
55 questions
Draw a typical neuron action potential. Discuss the ionic basis for the propagation of nerve impulse.
Differentiate between sympatric and parapatric speciation with suitable examples.
Give an account of aortic arches in reptiles, birds and mammals.
Describe the origin of code for zoological nomenclature.
Enlist the composition of saliva. Describe the mechanism of secretion of saliva.
Describe the uses of remote sensing in sustainable development.
Flight adaptations in birds
Describe the mechanism of sex determination in Drosophila.
Describe different kinds of coral reefs on the basis of their formation
What are the uses of Biotechnology in Forensic science?
Write a note on general characters of Prototheria
Give a schematic representation of differentiation of sexual phenotypes during early embryonic development in mammals.
Give an account of biological rhythms
Skeleton in sponges
With the help of labelled diagrams, give an account of the larvae found in Asteroidea, Ophiuroidea and Holothuroidea.
Define oxidative phosphorylation. Describe the theories of mechanism of ATP synthesis.
Explain biodiversity. Discuss different grades and factors affecting the distribution of animal biodiversity.
With the help of labelled diagrams only, explain the different larval stages in the life cycle of Fasciola hepatica (No description is required).
Describe the distribution, habits and habitat of Rhynchocephalia. Write a note on crocodilian and lacertilian characters of Sphenodon.
Describe various accessory respiratory organs of fishes with examples.
Draw an ultrastructure of plasma membrane. Discuss the roles of lipids in the regulation of membrane fluidity.
Describe the principle and applications of gel electrophoresis.
What is the general mechanism of blood coagulation? Describe the intrinsic pathway for the initiation of blood clotting.
What is RAPD? Give an account of the general methods for mapping human genome.
Enlist the sources of energy for muscle contraction. Describe the mechanism of contraction of skeletal muscle.
Transgenic animals
Write scientific names of any three pests of stored grains and describe the nature of damage and management of Sitophilus oryzae.
What is Hardy-Weinberg equilibrium? Describe the principles, mechanism and its applications in population genetics.
What is transgenesis? Describe the methods for gene transfer in animals and its applications.
What is metamorphosis? Explain the role of thyroxine in the regulation of amphibian metamorphosis.
Gamontogamy in Monocystis
What are vitamins? Describe the types and biological roles of fat-soluble vitamins.
Describe the characteristics of social insects with examples.
Define programmed cell death. Explain the molecular mechanism and significance of apoptosis during early embryonic development.
Division of biosphere
Describe the names of any four diseases of silkworm and their causal agents (scientific names), sources of infection, symptoms and management.
Describe the basic structure and functions of immunoglobulins.
Describe the sequence specific DNA binding proteins.
Explain the principle of spectrophotometer and describe its following components : (i) Radiation sources (ii) Phototube (iii) Prism
What is nucleosome? Explain the functional elements of eukaryotic chromosomes.
Describe the process of glomerular filtration. Discuss the determinants of glomerular filtration rate in human.
Draw an overview of eukaryotic cell cycle. Describe the roles of cyclins in the regulation of cell cycle.
Define mutation. Describe the types, causes and applications of mutations.
Define paleontology. Discuss the chronological order of elephant evolution.
Describe chromosome painting and its versatility in modern diagnostics.
Phosphorus biogeochemical cycle
What is Wobble hypothesis? How does it explain degeneracy in genetic code?
Explain origin of Amphibia and classify Amphibia up to sub class with characters and examples.
With the help of labelled diagrams, describe the mouth parts of house-fly, butter-fly and honey bee.
With the help of suitable diagrams, describe the different stages of life cycle of Nereis.
"Calcium is an initiator of cortical granules reaction." Explain.
Describe the differences between f-test and t-test.
What are embryonic stem cells? Discuss the isolation, differentiation and therapeutic applications of embryonic stem cells.
Describe the respiratory organs and mechanism of respiration in Unio.
"Glycolysis is considered as metabolic hub." Justify.