l.F.S. ..!-2015
ZOOLOGY
Paper-II
Time Allowed Three Hours IMaximum Marks: 200

Question Paper Specific Instructions
Please n:ad each of the following instructions carefully before attempting questions:

There are EIGHT questions in all, out of which FIVE are to be attempted. Questions rz,o. 1 and 5 are compulsory. Out of the remaining SIX questions, THREE are to be attempted selecting at least ONE question from each of the two Sections A and B.

Attempts of questions shall be counted in sequential order. Unless struck off, attempt of a question shall be counted even if attempted partly. Any page or portion of the page left blank in the Question-cum-Answer Booklet must be clearly struck off.

All questions carry equal marks. The number of marks carried by a question I part is indicated against it. Answers mitst be written in ENGLISH only. Neat sketches may be drawn, wherever required.


SECTION A

Ql. Write a relative account of each of the following 8x5=40

Transport of small and large molecules across plasma membrane
Euploidy and Polyploidy
Homology and Analogy
Palearctic and Nearctic regions
Plasmids and Cosmids

Q2. Describe the ultrastructure of mitochondrion and explain why it 1s considered as a symbiotic cell organelle. 20
What is Transcription Explain the initiation complex and the events leading to the formation of mRNA in eukaryotes. 20

Q3. What is signal transduction? With a labelled diagram, explain the steps involved. 20
Discuss the role of various isolating mechanisms in speciation.20

Q4. Give a historical account of naming an animal species and the validity of binominal system, adding a note on the role of International Code of Zoological Nomenclature (ICZN). 20
What 1s continental drift When did it occur and what are its evidences? 20

SECTIONB
Q5. Write notes on each of the following 8x5=40
Role of actin and myosin in muscle contraction
Types of placenta
Embryo transfer
Cyclic AMP
illtrafiltration in mammalian kidney

Q6. Explain what initiates the process of blood coagulation and discuss the role of different factors. 20
Describe the complexity of inner ear and its mechanism of hearing. 20

Q7. Give an account of the structural and functional characteristics of IgM and IgE immunoglobulins. 20
What is oxidative phosphorylation Describe the steps involved in the process and add a note on the role of enzymes at every step 1 with a schematic diagram. 20
QS. Explain the process of regeneration giving suitable examples from vertebrates. 20
Describe the fate map of gastrula with reference to frog. 20