Assam University 2007 B.Sc Zoology TDC Part-III Honours --- Ninth - Question Paper

NTS-07/ ZOOH-9 /063

2007
ZOOLOGY (Honours)
Ninth Paper
(Advance Physiology, Endocrinology, Developmental Biology, Genetics & Adaptation)
TDC Part-III

Full Marks : 70
Pass Marks : 21

Time : three hours

The figure in the margin shows full marks for the ques.

ans 5 questions, taking 1 from every Unit

UNIT –I

1. (a) define the process of digestion and absorption of fats. 5+5=10
(b) define th mechanism of contraction of skeletal muscle. 10

2. Write notes on any 4 of the subsequent : five x four = 20
(a) Vitamin A in vision
(b) Loop of Henle
(c) Liver
(d) Spleen
(e) Action Potential
(f) Neurotransmitters

UNIT –II

3. (a) What is Graffian follicles? explain the role of ovarian hormones in regulation of estrus
and menstrual cycle in mammals. 4+6 = 10
(b) What is G –Protein? define the molecular mechanism of action of steroid hormones.
2+8 = 10

4. Write notes on any 4 of the following: five x four = 20
(a) Calcium Homeostasis
(b) Placental Hormones
(c) 2nd Messengers
(d) ADH
(f) Digestive hormones
(g) Transport of Hormones

UNIT –III

5. What is Metamorphosis? define the process of metamorphosis in amphibians with special
reference to role of hormones. 2+8 = 10

6. Write notes on any 2 of the following: five x two = 10
(a) kinds of Placenta
(b) Fate Map
(c) Parthenogenesis
(d) Ecdysone

UNIT –IV

7. What is Genetic Engineering? define the process of gene cloning in bacteria. 2+8=10
8. Write notes on any 2 of the following: five x two = 10
(a) Restriction Enzymes
(b) Cloning Vectors
(c) Transgenesis
(d) Non-disjunction

UNIT –V

9. What is Speciation? define different isolating mechanism involved in speciation. 2+8=10
10. Describe cursorial adaptations in mammals. 5+5 =10

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Earning:   Approval pending.