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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