Thapar University 2006 B.Tech Biotechnology Plant Physiology & Plant Protection - Question Paper
Thapar Institute of Engineering & Technology
B.Tech Biotechnology (4th Year)
Final Term exam
BT012 (Plant Physiology & Plant Protection)
THAPAR INSTITUTE OF ENGINEERING & TECHNOLOGY: PATIALA B. Tech. (Biotechnology) 4th Year End-Semester Examination, December 2006 BT- 012 : PLANT PHYSIOLOGY AND PLANT PROTECTION
Time : 3 hrs._Instructor: Dr. M. Anand_MM : 45
Note:
Attempt any five questions. All parts of the same question should be strictly at the same place.
The evaluated answer sheets can be seen on 15.12.2006 in DBTES at 12.00 noon.
1. a) Write down the salient features of Auxin transport in the plant body. 5.5
Discuss the chemiosmotic model for polar transport of IAA. b) Explain the biosynthetic pathways of IAA with chemical structures. 3.5
2. a) Define inductive period and photoperiodism. Discuss the 6.0
classification of plants based on photoperiodic responses, b) "Short day plants are actually long night plants". Explain 3.0
3. a) What are phytochromes? Name some phytochrome mediated 5.0
processes in the plant body. Discuss the role of phytochrome in seed germination in Lettuce.
b) What are nastic movements and its types? How do they differ from 2.0 tropic movements?
c) Explain briefly the sleep movements in Mimosa pudica. 2.0
4. a) Draw a well labelled, self-explanatory diagram of Kreb's cycle. Name 5.5
3 enzymes which regulate citric acid cycle.
b) Explain the process of alcoholic fermentation. 2.5
c) How does cyanide - a deadly poison affects the cellular respiration. 1.0
5. a) What are natural and synthetic auxins? Name four most common 3.0
methods of auxin bioassay.
b) Discuss the role of auxins & cytokinins in apical dominance. 1.5
c) Name a natural gaseous hormone and discuss its physiological 3.0 effects on plants.
d) An excised leaf does not turn yellow if its is induced to root Explain. 1,5
6. a) Discuss the mechanism and significance of Crassulacean acid 4.0
metabolism in photosynthesis.
b) Write briefly about Anion (Salt) respiration OR Donnan 3.0 equilibrium.
c) Define water potential. What are the two factors which effect water 2.0 potential.
Write notes on (any 4) 9,0
(a) PDH complex (b) Pasieur effect (c) Quantasomes
(d) Hydroponics (e) Stomatal apparatus
7.
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| Earning: Approval pending. |
