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P.T.O.
MAR IVANIOS COLLEGE (AUTONOMOUS)
THIRUVANANTHAPURAM
Reg. No. :.………………… Name :.………………
Fifth Semester Career Related B.Sc. Degree Examination, November 2016
First Degree Programme under CBCSS Core Course VII: (for Botany and Biotechnology)
AUBB541: Plant Physiology
Time: 3 Hours Max. Marks: 80
SECTION A
Answer ALL the following in a word or one or two sentences.
1. Define Guttation.
2. Explain Hydroponics.
3. Define Osmosis.
4. What is Chromatography
5. Why C4 plants are given that name
6. Define 'Plasmolysis'.
7. What is the source of Oxygen evolved during Photosynthesis
8. Define 'Respiratory Quotient'.
9. Explain Denitrification.
10. What is 'RuBisCO'
(10 1 10 Marks)
SECTION B
Answer any EIGHT questions, not exceeding a paragraph.
11. Explain Nastic Movements in plants.
12. What are essential fatty acids List out any two examples.
13. Explain Photorespiration. Add a note on the organelles involved in Photorespiration.
14. Explain Cofactors in Enzymology.
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15. What is 'Crop Rotation' What is its significance
16. What is Vernalization
17. What is the use of Auxanometer
18. Briefly explain different Tropic Movements in plants.
19. Define Photophosphorylation.
20. Briefly explain the methods to break Seed Dormancy.
21. What is 'Kranz Anatomy' Give an example of plant with Kranz anatomy.
22. Mention various factors affecting Respiration.
2 16 Marks)
SECTION C
Short essay type Answer any SIX questions.
23. Write down five differences between Respiration and Photosynthesis.
24. What is Pentose Phosphate Pathway
25. Differentiate between Physical and Biological Nitrogen Fixation.
26. Explain the synthesis of Glycerol from Dihydroxy Acetone Phosphate.
27. Briefly explain Photoperiodism.
28. Briefly explain theories of 'Solute Translocation Mechanism'.
29. What are 'Essential elements' Write a note on the diseases caused by the deficiency of some of the important Essential elements.
30. Differentiate Passive Absorption and Active Absorption of minerals.
31. Describe various theories on 'Ascent of Sap'.
4 24 Marks)
SECTION D
Long essay type Answer any TWO questions.
32. What is 'Blackman's reaction' Explain how is it different from Light Reaction
33. Write an essay on 'Mode of Enzyme Action'. Add short notes on 'Competitive' and 'Noncompetitive Inhibitors'.
34. Write an essay on different Growth hormones and their practical applications.
35. Write an essay on Krebs Cycle of Respiration.
15 30 Marks)