W.B.C.S Main 2007 Optional Question Paper Zoology.

W.B.C.S Main 2007 Optional Question Paper Zoology paper 1

Group – A.Continue Reading W.B.C.S Main 2007 Optional Question Paper Zoology.

(Answer any three questions.)

1.  Mention the characters of Phylum Nemathelminthes।  Describe the Life-history of Wuchereria bancrofti.    5+15

2.  Discuss the affinities of peripatus with Annelida and Arthropoda. Comment on its systematic position.    8+8+4

3.  Discuss the statement – “Birds are glorified reptiles”।      20

4.  Make a comparison in tabular from between cartilagenous and Bony fishes. Write on the functions of swim-bladder.      14+6

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

(a)  Appendage

(b)  Components of circulatory system

(c)  Corals

(d)  Importance of Neopelina

(e)  Retrogressive metamorphosis

(f)  External morphology of Monotremata.     5×4

Group—B

Answer any two questions.

6.  What is culture fishery ?   Outline the process of pisciculture under inland fishery.  Discuss the methods of induced breeding.       2+4+14

7.  Define Ecosystem.   Discuss the nature of energy flow in ecosystem.   What is solar flux ?      4+12+4

8.  Write on the two major groups of animal behaviour.  Write on the methods of studying animal behaviour.     10+10

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

(a)  Secondary pollutants

(b)  Ganga Action Plan

(c)  Variables in Biology

(d)  Global warming

(e)  Attributes of organised societies

(f)  Algal bloom.     5×4

W.B.C.S Main 2007 Optional Question Paper Zoology paper 2

Group – A

(Answer any three questions.)

1.  (a)  Describe the nucleosome model of chromosome structure.    10

(b)  Give an account of various phases of cell cycle.     5

(c)  Draw the ultrastructure of a mitochondria.     3

(d)  What is SEM ?      2

2.  (a)  What is spermiogcnesis ?   Describe the process of spermiogenesis.     2+4

(b)  Distinguish between mesolecithal and megalecithal eggs; give one example each.  What is a telolecithal egg ?      4+1+2

(c)  Give an account of hypoblast formation  in chick embryo.      4

(d)  What do you mean by capacitation ?      3

3.  (a)  What is the primary structure of a protein ?      2

(b)  What are conjugated proteins ?   Give two examples.     2+1

(c)  Give examples of water soluble vitamins.     2

(d)  What do you mean by a reducing sugar ?     2

(e)  What is epimerism ?   Give an example.      2+1

(f)   Distinguish between gluconeogenesis and glycogenosis.      2

(g)  What is facultative reabsoiption of water ?   Where does it take place in our body and how does it take place ?       2+1+3

4.  (a)  What is binomial nomenclature ?      2

(b)  What is a living fossil ?       2

(c)  Distinguish between sympatric and allopatric speciation.      5

(d)  What is Hardy-Weinbcrg equilibrium ?       3

(e)  What is cladogenesis ?      2

(f)  How do you define a race ?      2

(g)  Distinguish between a sibling species and a sub-species.     4

5. (a)  What is anticodon ?      3

(b)  What are Okazaki fragments ?     3

(c)  Name the sugar, pyrimidine and purine bases found in DNA and RNA.    3

(d)  State the functions of DNA ligase.    2

(e)  What is synaptonemal complex ?     3

(f)  What is transcription ?     2

(g)  Describe the structure of t-RNA.     4

6.  Write short notes :

(a)  Significance of meiosis.     3

(b)  Endoplasmic reticulum.    5

(c)  Fertilization cone.    4

(d)  Gap junctions.    4

(e)   Cholecalciferol.    4

Group—B

Answer any two of the following questions.

7. (a)  Give Michaelis-Menten equation (derivation not needed). What is Km ?      1+2

(b)  Explain “Induced-fit Model” of enzyme action.     5

(c)  Define isozymes.     2

(d)  What is heteroglycan ?      2

(e)  What is iodine number ?     2

(f)  Which visual pigment is responsible for dim-light vision ?   Give the chemical composition of this pigment. In which part of the eye is this pigment found ?  How visual impulse is formed ?    1+1+1+3

8. (a)  What is a polocyte or a polar body ?   What is its significance in orogenesis ?     2+2

(b)  Discuss in brief the induction phenomenon during the development of eye in vertebrates.     5

(c)  What is the significance of primitive streak formation during gastrulation in chick ?     4

(d)  State the significance of blustocoel formation prior to gastrulation.     2

(e)  What is ultrafiltration ?  In which part of our body ultrafiltration takes place ?     11/2+11/2

(f)  What is renal threshold ?     2

9. (a)  Distinguish between :

(i)  Enzyme and ribozyme.       4

(ii)  Bottle neck effect and founder effect.     4

(b)  Explain punctuated equilibrium.     4

(c)  Describe the experiment of Urey and Miller in connection with the origin of life on earth.     4

(d)  How angiotensin II is formed from angiotensinogen ?  State the functions of angiotensin II.    2+2

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