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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