Karnataka State Women University 2008 B.Sc Botany - Question Paper

B.Sc DEGREE exam MAY 2008
4th Semester
BOTANY
Time:Three hours Maximum:80marks
All ques. are compulsory.
ans all the ques. in the identical ans book.

Draw neat diagrams and provide formula wherever necessary.

I.Answer any TEN of the following:(10*2=20)

1.Exoenzyme.

2.Prosthetic group.

3.Feedback inhibition.

4.Osmotic potential.

5.Capillary water.

6.Emmerson effect.

7.ammonification.

9.Nitrosomonas.

10.Cytokinin.

11.Phytochrome.

12.Nastic movement.

II.Answer any 6 of the following:(6*5=30)

13.Give an account of classification of enzymes.

14.Give the characters of enzymes.

15.Discribe the active absorption of water.

16.Why is transpiration in higher plants called a neccessary evil?

17.Explain Hill reaction.

18.Discribe Biological nitrogen Fixation.

19.Explain various phases of growth with reference to sigmoid curve.

20.Give an account of seed dormancy.

III.Answer the following: (3*10=30)

21.What is ascent of sap? discuss the physical force theories for it.
Or
Discribe the mechanism of phloem transport in plant with reference to munch's mass flow

22.Give an account of calvin cycle(c3 pathway) in photosynthesis.
Or
Discribe electrone transport system in respiration.

23.What are plant regulators? discribe the physiological effect of auxins.
Or
provide an account of photoperiodism and vernalization.

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Earning:   Approval pending.