W.B.C.S Main 2000 Optional Question Paper Zoology.

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W.B.C.S Main 2000 Optional Question Paper Zoology paper 1

Group – A.Continue Reading W.B.C.S Main 2000 Optional Question Paper Zoology.

(Answer any three questions.)

1.  Write on the morphology life cycle and modes of transmission of Entamoeba histolytica      12+4+4

2.  Describe the structure of a coralite.  Write on the mechanism of formation of corals.       8+12

3.  Describe the Tadpole larva of Ascidia and write on its metamorphosis leading to adulthood.     8+12

4.  What are aortic arches ?  Write on their modifications in Reptiles and Mammals.      4+10+6

5.  Write notes on any four of the following :-

(a)  Hydroid phase of obelia.

(b)  Wuchereria bancrofte

(c)  Nervous system of pila.

(d)  Concept of Dipleurula larva in the phylogeny of Echinoderms.

(e)  Dipnoi,

(f)  Electric organ of fishes,

(g)  Sourischia.

(h)  Affinity of Marsupial.      4×5

GROUP-B

Answer any two questions.

6.  Define Pollution.  How does air get polluted ?   Suggest some measures to prevent air pollution.         4+12+4

7.  What is silk ?  Write briefly on sericulture.      2+18

8.  Write notes on any four of the following :-

(a)  Flow of carbon in Biotic System,

(b)  Innate behaviour,

(c)  Median,

(d)  Uses of chi-square test,

(e)  Lac insects,

(f)  Zonation of Marine Ecosystem,

(g)  Ecosystem,

(h)  Duties of wroker bees in a hive

W.B.C.S Main 2000 Optional Question Paper Zoology paper 2

Group – A

(Answer any four questions.)

1.  Give a brief account of Chemical Hypothesis with regard to Origin of Life.     15

2.  Describe the ultra structure and explain the functions of Golgi Complex.    8+7=15

3.  Elucidate one gene-one polypeptide concept.     15

4.  Explain the physiology of Photoreceptive mechanism of retinal elements of vertebrate eye in bright and dim light.     15

5.  What is placenta ?  What are the different types of placenta ?   How is it formed in rabbit ?   State its functions.     1+3+8+3=15

6.  What is an enzyme ?  What is prosthetic group ?  Describe the effect of substrate concentration, temperature, and PH on the role of enzyme action.      1+2+4+4+4=15

7.  Write short notes on any three.

(a)  A.T.P.

(b)  Types of clearage.

(c)  Role of bile in fat digestion.

(d)  mRNA and tRNA.

(e)  Living fossil,

(f)  Process of translocation.      3×5= 15

GROUP-B

Answer any two questions.

8.  Explain the fate of Glucose in the animal body after its absorption through intestinal wall.     20

9.  Briefly describe De Vries theory of mutation and correlate the theory with Neo Darwinism.    20

10.  Explain allele and multiple alleles with examples.  How would you prove that blood group (O.A.B) is a multiple allele ?  Mrs. De and Mrs. Roy had babies at the same hospital at the same time.  Mrs. De took home a boby girl and Mrs. Roy received a baby boy. However, Mrs. Roy was sure that she had a girl and brought suit against the hospital.  Blood test showed that, Mr. Roy-  ‘O’ type, Mrs. Roy-  ‘AB’ type,  Mr. & Mrs. De-  both ‘B’ type,  baby girl-  ‘A’ type and baby boy-  ‘O’ type.  Had an exchange occured ?     5+10+5=20

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