2023 2024 Student Forum > Management Forum > Main Forum

 
  #2  
25th August 2014, 10:09 AM
Super Moderator
 
Join Date: Apr 2013
Re: WBCS Past Years Solved Question Papers

As you are looking for the last year Zoology Question paper of WBCS (Main) Exam, so here I am sharing the same with you

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

***


Quick Reply
Your Username: Click here to log in

Message:
Options

Thread Tools Search this Thread



All times are GMT +5. The time now is 02:31 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
SEO by vBSEO 3.6.0 PL2

1 2 3 4