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

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

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



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



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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