Karnatak University 2007 B.Sc Botany - Question Paper

B.Sc DEGREE exam MAY 2007
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.co-enzyme.


2.Guttation.

3.R.Q.

4.Inhibitors.

5.Water potential.

6.Isomerases.

7.Nitrification.

8.2,4-D.

9.Rhizobium.

10.Quantasome.

11.Vernalization.

12.Ethylene.

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

13.Give the properties of enzymes.

14.Explain the mode of enzyme action.

15.Explain cohesion-tension theory of ascent of sap.

16.What are macro-nutrient?Describe deficiency symptoms of any two.

17.Write a note on fermentation.

18.Discribe nitrogen fixation.

19.What is photoperiodism?Classify the plant based on it.

20.Describe nastic movement.

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

21.Describe the theories to regulate the opening and closing of stomata.
Or
What is absorption? define active absorption of water in plant.

22.Describe light reaction of photosynthsis.
Or
define kreb cycle.

23.What are phyto-harmones? define the physiological functions of gibberellins.
Or
Write an account on seed dormancy.


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Earning:   Approval pending.