Bsc 6th sem core-13 Plant Metabolism Question Paper under CBCS dibrugarh University 2022
1. (a) Choose the correct answer : 1x3=3
(i) In photosynthesis, liberated due to oxygen
(1) reduction of CO2
(2) photolysis of water
(3) hydrolysis of carbohydrate
(4) breakdown of chlorophyll
(ii) In root nodule of legumes, leg hemoglobin is found in
(1) bacteroids
(2) cytosol of infected nodule cell
(3) cytosol of uninfected nodule cell
(4) All of the above
(iii) The net gain of ATP molecules in glycolysis is
(1) O
(2) 2
(3) 4
(4) 8
3. Write explanatory notes on any two of the following:
6x2=12
(a) B-oxidation of fatty acids
(b) Chemiosmotic
mechanism
of
ATP
synthesis
(c) Synthesis and degradation of sucrose
(d) Plant cell signal transduction
4. Describe schematically
the
pentose
phosphate pathway of glucose oxidation.
What is its significance?
9+3=12
Differentiate between anabolism
and
catabolism. Explain the pathways of anabolism and catabolism. How can the pathway be regulated?
2+8+2=12
5. What are the chief sources of nitrogen for higher plants? Describe the mechanism of nitrogen fixation by free living and symbiotic bacteria. Explain the ecological significance of this process. 2+7+3=12
What is 'dark reaction' in photosynthesis? Dscribe the mechanism of dark reaction in C3 plants.
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