W.B.C.S Main 2001 Optional Question Paper Zoology.
W.B.C.S Main 2001 Optional Question Paper Zoology paper 1
Group – A.Continue Reading W.B.C.S Main 2001 Optional Question Paper Zoology.
(Answer any three questions.)
1. How would you distinguish between a male and a female Ascaris ? State briefly the life-cycle of Ascaris lumbricoided. Add a note on its pathogenicity and control. 5+10+3+2 = 20
2. What is reproduction ? State different methods of reproduction in the following Protozoa.
(a) Amoeba Proteus
(b) Euglena Viridis
(c) Plasmodium Vivax
(d) Paramoecium. Caudatum 4+4 X 4 = 20
3. What is ciliary mode of feeding ? Give an account of its mechanism in lower chordates. Comment on its evoluitonarv significance. 2+15+3 = 20
4. Distinguish between neotetvy and paedogenesis. Describe the phenomenon of neotenv in Amphobia with suitable examples. State the hormonal control of Neoteny. 4+10+6 = 20
5. Write short notes on any four of the following :-
(a) Ultrastructure of Cilia and flagella
(b) Coral and coral-reef formation,
(c) Torsion and detorsiort in Gastropoda,
(d) Trypanosomiasis,
(e) Exoskeletal structures in Pigeon.
(f) Ruminant stomach.
(g) Affinities of etenophora.
(h) biling Mechanism in Snakes. 5×4 = 20
Group – B
Answer any two questions.
6. What is ecosystem ? Mention the main structural and functional components of an ecosystem. What is food-chain ? Explain with suitable examples the Grazing and Detritus food-chain in the ecosystem. Define ecotone and edge-effect. 2 + 4 + 2 + 8 + 4 = 20
7. Define pollution. Classify the pollutants responsible for Air-pollution. Discuss briefly the various causes of Air-pollution. State the effective measures for controlling air-pollution. 2 + 4 + 8 + 6 = 20
8. (a) What is silk ? Mention its composition . 2 + 3
(b) Discuss the causative agents, symptoms and control, measures of the diseases of silk worm larvae. 10
(c) Comment on the application of bio-technology in the improvement of silk worm strains. 5
9. Gvie brief idea about any four of the following:
(a) Circadian rhythm,
(b) Role of hormone in animal behaviour,
(c) Method of polyculture in India ,
(d) Major paddy pests .
(e) Chi-square and ‘t’ test,
(f) Prospect of Pearl Culture in India ,
(g) Bio-diversity ,
(h) Ozone -hole. 5 x 4 = 20
W.B.C.S Main 2001 Optional Question Paper Zoology paper 2
Group – A
(Answer any three questions.)
1. Discuss in brief the nucleosome model of chromosome 20
2. How is synthesis of MRNA brought about to DNA template ? State the roles of Sigma factor, the coreenzyme and rho factor in this process. 20
3. Comment on : (any four)
(a) DNA finger printing (b) Reverse transcription (c) Promiscuous DNA (d) Daenyl ketoauria (e) Downsyndrome. 5X4 = 20
4. Give an account of the modern concept of evolutionary theories. 20
5. What is adaptive radiation ? State the law proposed by if Osborn regarding adaptive radiation in mammals and justify the with a suitable example 20
6. What do you know about Zoological nomenclature ? Write the rules of international code of Zoologica nomenclature. 20
Group B
(Answer any two questions.)
7. What are enzymes, co-enzymes and isozymes ? Give examples. Write briefly on factors influencing enzymes, activity. 6 + 14 = 20
8. State the difference between glomerular filtrate and urine . Give a note on counter current mechanism. What do you mean by obiligatory and facultative absorption of water in kidney ? 4 + 10 + 6 = 20
9. Comment on (any two)
(a) Oranizer concept. (b) Fate map . (c) Structures and functions of chorio-allantoic ptacenta. 10×2 = 20
10. Write notes on (any four ) :
(a) Michael is constant. (b) Cholesterol. (c) Properties of monosaccharides. (d) locine number and saponification, (e) Electro-phoresis . (f) Herlng-Breuer Reflex. 5×4 =20
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