University of Madras Biology Madras University, M.Sc Botany degree Examination, Plant Physiology,May 2019. University model question papers

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Posted Date: 25 Jan 2021      Posted By:: Jannane.M    Member Level: Gold  Points: 3 (₹ 2)

2019 University of Madras Biology M.Sc. Botany Madras University, M.Sc Botany degree Examination, Plant Physiology,May 2019. University Question paper

Course: M.Sc. Botany   University/board: University of Madras

Are you looking for the old question papers from Madras University of Plant Physiology paper? Here is the previous year question papers from Madras University. This is the original question paper of Plant Physiology exam conducted in May 2019. Feel free to download the question paper from here and use it to prepare for your upcoming exams.

May 2019 P/ID 40231/PBTL

Time : Three Hours Maximum : 100 marks

PART A - (10×2=20 marks)

Answer all questions in 50 words each


2. Respiration Quotient

3. Saturated fatty acids

4. Phenolic compounds

5. Molecular Nitrogen

6. Water potential

7. Chlorosis

8. Phases of growth

9. Progressive senescence

10. Stress endure plants

PART B - (5×6=30 marks)

Answer all questions in 250 words.

11.a) Explain briefly cyclic electron transport.


b) Briefly explan significance and mechanism of cyanide resistant respiration.

12.a) Explain commercial utilization of fats.


b) Briefly explain the role of secondary metabolites in plant microbial interaction.

13.a) Give brief account on Aspartate synthesis.


b) Explain Physico-chemical properties of water.

14.a) Give a brief account of essentiality olf zinc and molybdenum in plant nutrition.


b) Explain the mechanism of phytochrome action.

15.a) Explain the mechanism of senescence.

b) Write Critical notes on cold stress.

PART C - (5×10=50 marks)

Answer all questions each in 500 words.

16.a) Explain the mechanism of phytophosphorylation. How it differ from oxidative phosphorylation.


b) Explain oxidative Pentose phosphate pathway and it's significance.

17.a) Give a detailed account on site and mechanism of glyoxylate cycle.


b) Describe biosynthesis and functions oif steroids.

18.a) Describe structure and biochemistry of nitrogenase.


b) Explain kinds of transpiration.How does it differ from guttation.

19.a) Give a detailed account on mechanism of absorption of solutes.


b) Explain biosynthesis and mode of action of abscissic acid.

20.a) List out the physiological changes going on in seeds during seed germination.


b) Differentiate abiotic and biotic stress.Explain light stress effects in plants.

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