Main Exam 2010 Paper -II ZOOLOGY

ZOOLOGY
Paper-II
INSTRUCTIONS

SECTION-A
1. Answer any FOUR, each in around 150 words 15x4=60
Distinguish between allopatric and sympatric speciation.
Explain the functional differences between ShineDalgarno sequence and Pribnow sequence
Comment on phenylketonuria as a genetic disorder.
Distinguish between classical taxonomy and molecular taxonomy.
Distinguish between Darwinism. and neoDarwinism

2. Explain th·e structure of the basic level of organization of eukaryotic genetic material. Name two h"gher levels of organization. 20
Which organelle is well developed in a secretory cell Describe the structure to justify its function. 20
List the co1nponents of prokaryotic translation initiation complex. Explain how it is assembled to initiate translation. 20

RNA processing is a characteristic of euk??ryotes only and not of prokaryotes. Explain this with reference to gene organization. 20
Enunciate the Mendelian laws of inheritance. Would MendePs laws hold good urider all conditions Justify your contention. 20
What are "suicide of cells Btjefly describe their structure and function. 20

What are "Darwin's Finches" Explain their significance in Evolution.20
Critically comment on the justification of biodiversity studies. 20
Write a short note on Australopithecus. 20

SECTION-B
5· Write short n·otes on any FOUR of the following in about 150 words ,each 15 x4=60
(a)Cyclic-AMp as a second messenger
(b)Types and functions of mammalian selivaIY glands.
(c)lnteractions that stabilize the secondary and tertiary structure of proteins.
(d)Excitatory and inhibitory neurotransmitters.
Grey crescent

6. What are high energy compounds Substantiate .)f their role in biological systems. 20
Classify L-a1nino acids on their structural basis. What is the biochemical importance of sulphur containing amino acids 20
Give a sehe1natic representation of thyroxin biosynthesis. 20

7. Describe briefly Mitchell cbemi-osmotic hypothesis for ATP synthesis. 20
Write briefly on t'he control and regulation of renal excretion with reference to mammals. 20
Write a note on female sexual cycles. 20

8. Explain the changes undergone by sperm in the female reproductive tract of 1na1nn1als. 18
Define teratoge·nesis and write a note on Thalidomide Syndro1ne". 18
Write a note on homeotic genes in the control of early develop1nent. 24