LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034  B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & BIOTECHNOLOGY

AE 10

FIFTH SEMESTER – NOV 2006

         PB 5500 – PLANT PHYSIOLOGY

(Also equivalent to PBB 510)

 

 

Date & Time : 25-10-2006/9.00-12.00         Dept. No.                                                       Max. : 100 Marks

 

 

Part – A

Answer the following                                                                                     (20 marks)

I Choose the best answer                                                                                (5 x 1 = 5)

 

1. Exchange of gases takes place by the mechanism of

1. Imbibition b. Endosmosis         c. Diffusion     d. Exosmosis

 

1. The rate of transpiration increases by the rate of salt uptake. This indicates:

1. Passive-mass flow b. Passive-ion exchange
2. Active-carrier concept d. Active-cytochrome pump

 

1. Accumulation of organic acid in CAM plants is

1. Oxalo acetic acid b. Phospho enol pyruvic acid
2. Malic acid d. Fumaric acid

 

1. The site of glycolysis is

1. Cytoplasm b. Mitochondrial membrane
2. Mitochondrial matrix d. Mitochondrial cristae

 

1. Vernalization refers to the ——— treatment

1. Cold b. Heat c. Acid                        d. Alkali

 

II State whether the following statements are true or false                            (5 x 1 = 5)

 

1. Aquaporins are proteins that transport water.
2. Potassium is essential for auxin synthesis.
3. Kranz anatomy is seen in C₃ plants.
4. Leg haemoglobin is synthesized only by legume roots.
5. Biologically active form of phytochrome is Pfr.

 

III Complete the following                                                                             (5 x 1 = 5)

 

1. Movement of water within a cell is known as ———————.
2. Standard nutrient solution used in hydroponics is ——————.
3. Glycolate is produced in ————– pathway.
4. Prosthetic group of nitrite reductase is —————-.
5. GA₃ was discovered in the fungus ————- ————-.

 

 

 

 

 

 

 

 

IV Answer the following not exceeding 50 words each.                               (5 x 1 = 5)

 

1. Distinguish between apoplast and symplast.
2. What are trace elements?
3. What is Law of limiting factors?
4. Mention the importance of nitrate reductase.
5. Expand LDP and SDP.

Part – B

 

Answer any FIVE of the following not exceeding 350 words each.      (5 x 8 = 40)

 

1. How water potential is determined?
2. Describe the mechanism of stomatal movement.
3. Explain the transport phenomenon of organic solutes in plants.
4. Illustrate only the reactions of C₃ cycle.
5. Describe the biochemistry of nitrogen fixation.
6. Write notes on the synthesis of amino acids.
7. Give the physiological roles of cytokinins.
8. Enumerate the reasons for seed dormancy. List the methods to break it.

 

Part – C

Answer the following not exceeding 1500 words each.                    (2 x 20 = 40)

 

1. (a) Explain the theories on the active absorption of minerals.

 

Or

 

(b) Describe the various events in the light reactions.

 

1. (a) Give a schematic representation only of Kreb’s cycle and oxidative electron

transport chain. Add note on its energy budget.

 

Or

 

(b) Write an essay on the effect of salinity on crop plants.

 

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc.

IB 33

DEGREE EXAMINATION –PLANT BIOLOGY & PLANT BIO-TECH.

FIFTH SEMESTER – APRIL 2007

PB 5500 – PLANT PHYSIOLOGY

 

 

Date & Time: 27/04/2007 / 1:00 – 4:00          Dept. No.                                                     Max. : 100 Marks

 

 

 

Part – A (20 marks)

 

Answer all the questions.

I  Choose the best answer                                                                   (5 x 1 = 5)

 

1. Symplast is associated with :

1. Plasmodesmata b. Plasma membrane c. Xylem          d. Phloem

 

1. Which one of the following is not easily absorbed by plants?

1. Nitrogen b. Potassium c. Calcium       d. Iron

 

1. Oxygen evolved during photosynthesis is derived from

1. Carbon di oxide b. Starch c. Water                       d. ATP

 

1. Legumes transport nitrogen primarily in the form of
   1. Aspargine        b. Allantoin     c. Glutamate                d. Ornithine

 

1. Phytohormone used in fruit ripening is

1. Auxin b. Cytokinin c. Gibberellic acid       d. Ethylene

 

 

II  State whether the following statements are true or false.              (5 x 1 = 5)

 

1. Movement of water is by cohesion and adhesion.
2. UV-visible spectrophotometer is used to detect micro nutrients.
3. CAM plants belong to C₄ type.
4. Glycolysis takes place in mitochondria.
5. Biologically active form of phytochrome is Pr.

 

III  Complete the following.                                                               (5 x 1 = 5)

 

1. Ratio of turgid weight with fresh and dry weight is known as ————-.
2. Die Back disease is caused due to the deficiency of ————-.
3. The rate of respiration equals to the rate of photosynthesis which is termed as —-.
4. Prosthetic group for nitrate reductase is —————-.
5. Hormone used to break the seed dormancy is ————-.

 

IV Answer the following each within 50 words.                               (5 x 1 = 5)

 

1. List any 2 applications of Laws of Thermodymaics.
2. Comment on antiport and symport.
3. What is CO₂ burst mechanism?
4. Expand GDH and GOGAT.
5. What is Richmond Lang effect?

 

Part – B

 

Answer any FIVE of the following, each not exceeding 350 words.                            (5 x 8 = 40)

 

1. Compare the Munch Mass flow hypothesis with solute transport in plants.
2. Describe the theory of photosynthesis for stomatal movements.
3. Tabulate the roles and deficiency symptoms of macronutrients.
4. Distinguish between cyclic and non-cyclic photophosphorylation with illustrations.
5. Explain trans and reductive amination reactions.
6. Give an account of glucose oxidation till pyruvate formation.
7. Describe the functions of auxins in plants.
8. With suitable illustrations and examples, write notes on physiology of flowering.

 

Part – C

 

Answer the following, each not exceeding 1500 words. Draw diagrams wherever necessary.                                                                                                                                  (2 x 20 = 40)

 

1. (a) Explicate the active mineral uptake mechanism with suitable theories.

Or

(b) Illustrate and explain CO₂ fixation process in C₃ plants.

 

1. (a) Describe the components of nitrogenase. Add note on its activity.

Or

(b) Discuss the effects of drought on crop plants.

 

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

         B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & PLANT BIO-TECH.

ED 07

FIFTH SEMESTER – November 2008

PB 5509 – PLANT PHYSIOLOGY

 

 

 

Date : 03-11-08                     Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

 

PART-A (20 marks)

1. Choose the correct answer: (5 x 1 = 5 marks)

 

1. Guttation occurs through

• Hydathodes (b) Stems         (c) Roots          (d) Lenticels

2. Light reaction takes place in the

• Stroma (b) grana         (c) lamella       (d) matrix

3. The hormone responsible for fruit ripening is

• ABA (b) Auxin          (c) Ethylene     (d) Gibberellic acid

4. Glycolysis takes place in the

• Cytoplasm (b) Mitochondria (c) Chloroplast            (d) Golgi bodies

5. The enzyme nitrogenase is highly sensitive to

• Nitrogen (b) Argon         (c) Oxygen       (c) Halogen

 

1. State whether the following statements are True or False: (5 x 1 = 5 marks)

 

6. Water potential is the sum of solute, matric and pressure potential.
7. Calcium is responsible for the formation of cell wall.
8. Photolysis of water is associated with Photosystem I.
9. Lysosomes are linked with photorespiration
10. Flowering depends on the ration of P_r to P_fr

 

• Complete the following: (5 x 1 = 5 marks)

 

11. The movement of water from the soil to plants through the living cells is called ____________.
12. Active uptake of minerals is dependent on ______________.
13. 2, 4-D is a selective _______________.
14. The symbiotic nitrogen-fixing bacterium in the root nodules is ______________.
15. Bolting is associated with _________________.

 

• Answer the following in 50 words: (5 x 1 = 5 marks)

 

16. Comment on Antitranspirants.
17. Write a note on Kranz Anatomy
18. Definef SPAC.
19. What is the relation to carbon with respect with respect to nitrogen metabolism?
20. What are the characteristics of salinity on crop plants?

 

 

 

 

PART-B

 

Answer any FIVE of the following in about 350 words:                                       (5 x 8 = 40 marks)

 

21. Enumerate the theories related to active uptake of solutues.
22. What are the different types of dormancy and write a note on the methods to break dormancy.
23. How are amino acids synthesized?
24. Explain cyclic photophosphorylation.
25. Write short notes on Gluconeogenesis.
26. Describe the theories associated with stomatal movement.
27. Elaborate on glycolate pathway.
28. Describe the metabolism in CAM plants.

PART-C

 

Answer the following questions in about 1500 words:                              (2 x20 = 40 marks)

 

29. (a) Illustrate the types of C₄ Compare C₃ with C₄ plants.

(OR)

• What is the fate of pyruvic acid in the presence of oxygen?

30. (a) Give the bioassays, mechanism of action and application of auxins.

(OR)

• Discuss in detail the physiology of flowering.

 

 

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        LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & PLANT BIO-TECH.

VE 16

FIFTH SEMESTER – April 2009

PB 5509 / 5500 – PLANT PHYSIOLOGY

 

 

 

Date & Time: 16/04/2009 / 9:00 – 12:00 Dept. No.                                                       Max. : 100 Marks

 

 

PART – A                                          (20 MARKS)

1. CHOOSE THE CORRECT ANSWER.

 

1. Dark reaction takes place in ________ of chloroplast.
2. Thylakoid Stroma         c. Grana           d. Frets.
3. Enzymes required for respiration are found in
4. Glyoxysome b) Mesophyll   c) Mitochondria                      d) Peroxisome
5. The End Product of Glycolysis is
6. a) Pyruvic Acid b) Acetic Acid           c) Oxalo Acetic Acid                                        d) Phosphoglyceric  Acid
7. Parthenocarpy is brought about by
8. Cytokinin b) Ethylene      c) Gibberellins             d) Abscissic  Acid
9. Chlorosis occurs due to the deficiency of
10. Copper b) Iron             c) Phosphorous                        d) Boron

 

1. STATE WHETHER THE FOLLOWING STATEMENTS ARE TRUE OR FALSE

 

6. The first stable compound produced in Calvin cycle is 3-phosphoglyceric
7. Photorespiration is called C₃
8. Auxins are used as weed killers.
9. Vernalization shortens the vegetative period of the plants.
10. Seeds, that, wait for suitable environmental condition to germinate are said to be QUIESCENT.

 

• COMPLETE THE FOLLOWING:

 

11. C₄ plants exhibit _____________ anatomy of leaves.
12. _________ is the precursor for Auxin.
13. In CAM cycle the first product is _______ Acid.
14. The germination by red-light and inhibition by far-red light involves the operation of a proteinaceous pigment called ___________.
15. In the presence of light water gets dissociated into Hydrogen ions & Hydroxyl ions. This is called ___________.

 

1. ANSWER THE FOLLOWING EACH WITH IN 50 WORDS.

 

16. Define water potential?
17. What are Quantosomes?
18. What ate Cytochromes?
19. What is the significance of Photo respiration?
20. Explain?

PART – B                                          (5 x 8 = 40 marks)

ANSWER ANY FIVE OF THE FOLLOWING.  EACH NOT EXCEEDING 350 WORDS.

 

21. What is Transpiration. What are its kinds. Also add notes on Antitranspirants.
22. Explain Donnan’s Equilibrium.
23. Explain the Glycolate Pathway.
24. Explain Trans amination.
25. What are the causes for Dormany.
26. Explain Photoperiodism.
27. Give a brief account of Bioassay for Auxins.
28. Explain the effects Vernalization.

PART – C                              (2 X 20 = 40 MARKS)

ANSWER THE FOLLOWING, EACH NOT EXCEEDING 1500 WORDS.  DRAW DIAGRAMS WHEREVER NECESSARY.

 

 

29. Write an essay on Biological Nitrogen Fixation.

 

(or)

Explain the Kreb’s cycle.

 

30. Write down the practical uses of the hormones
31. Auxins b) Gibberelins              c) Cytokinins                           d) Ethylene

 

(or)

Write an essay on cyclic photophos phorylation.  Mention a note on its significance.

 

 

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

   B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & PLANT BIO-TECH.

FIFTH SEMESTER – NOVEMBER 2010

PB 5515 – PLANT PHYSIOLOGY

 

 

 

Date : 29-10-10                     Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

                                                              PART – A                                                                (20marks)

Answer ALL the questions                                                                                (5×1=5)

1. Choose the correct answer
2. The adsorption of water by hydrophyllic colloids is known as
3. a) Osmosis b) Imbibition             c) Plasmolysis          d) Turgidity
4. Magnesium is essential for the formation of which pigment?
5. a) Phycobilins b) Carotenes              c) Chlorophyll         d) xanthophyll
6. Non-cyclic photophosphorylation requires
7. a) PS I b) PS II                    c) PS I&PSII           d) Noneof these
8. Glycolysis takes place in the
9. a) Mitochondria b) Chloroplast          c) Cytoplasm          d) Nucleus
10. Ripening of fruits is associated with
11. a) Gibberellins b) Cytokinins            c) Ethylene             d) Auxin

 

1. State whether the following statements are True or False.     (5×1=5)
2. Silicone oils act as Antitranspirants .
3. Donnan equilibrium is an example of passive absorption.
4. Lysosomes are involved in Photorespiration.
5. The light reaction takes place in the stroma of the chloroplast.
6. Florigen is a flowering hormone.

III. Complete the following                                                                                                              (5×1=5)

11. Exudation of water from plants in the form of liquid is called_______.
12. Active absorption of solutes requires metabolic ___________.
13. Kranz anatomy is observed in _________plants.
14. Symbiotic nitrogen fixation is carried out by the bacterium________.
15. An example of a Short Day plant is _________.

 

 

1. Answer the following each in 50 words.                         (5×1=5)
2. What is Symplast?
3. What is meant by Photolysis of water?
4. Give two deficiency symptoms of Boron.
5. Mention any two effects of drought on plants.
6. Define transamination.

PART-B                                      (5×7=35marks)

Answer the following each answer not exceeding 500 words.

Draw diagrams wherever necessary.

21. a).Describe the types of transpiration and state its significance.

(or)

1. b) Show the relationship between the components of Water potential.
2. a). Mention any two symptoms of any three Macroelements.

(or)

1. b) Explain Donnan equilibrium.
2. a).Explain Cyclic Photophosphorylation.

(or)

1. b) Discuss the metabolism of CAM plants.
2. a) Draw the Krebs cycle and tabulate the number of ATP produced.

(or)

1. b) Highlight the mechanism of Photorespiration.
2. a) Enumerate the applications of Gibberellins.

(or)

1. b) Discuss the phenomenon of Vernalisation.

PART- C                                            (3×15=45marks)

  Answer any Three of the following, each answer not exceeding 1200 words. 

   Draw diagrams wherever necessary.

26. Trace the path of water from the time it enters the root hair and reaches the leaves.
27. Write notes on the mechanism of absorption of mineral salts.
28. Explain the mechanism of symbiotic Nitrogen fixation. Highlight the importance of Nitrogen to

plants.

29. Trace the path of carbon via the Calvin cycle.
30. Define Dormancy.Explain the factors causing dormancy and the methods to break dormancy.

 

 

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & PLANT BIO-TECH.

FIFTH SEMESTER – APRIL 2011

PB 5515/PB 5509/PB 5500 – PLANT PHYSIOLOGY

 

 

 

Date : 11-04-2011              Dept. No.                                                    Max. : 100 Marks

Time : 9:00 – 12:00

 

PART A(20 marks)

ANSWER ALL THE QUESTIONS

1. Choose the correct answer                                                                                     (5 x 1 =5)
   1. The antitranspirant that induces complete stomatal closure is
2. Gibberellic acid Auxin        c. Ethylene                d. Abscisic acid.
3. The accessory pigments in photosynthesis is
4. Anthocyanin Carotenoids         c. Bilirubin    d. Betacyanin.
5. The raw material for Gluconeogenesis
6. Glucose                          sucrose                 c. starch        d. fatty acid
7. The plant hormone that is associated with inducing dormancy is
8. Auxin   G A₃                      c.  Cytokinin             d. Abscisic acid.
9. The micro nutrient that is important for the synthesis of IAA is,
10. Zinc Molybdenum                   c. Cobalt                   d. Iron.

 

1. State whether the following statements are True or False:             (5×1=5)
2. Chemiosmotic hypothesis explains the regeneration of ATP.
3. Donnan membrane Equilibrium concept explains the absorption of mineral ions against the concentration gradient.
4. Vernalization is the cold treatment which suppresses the flowering.
5. CAM plants are also known as C₄
6. Apoplast includes the entire living component.

III. Complete the following:                                                                                                       (5×1=5)

11. The hormone that induces chlorophyll biosynthesis is __________________.
12. The mineral element _______________ is present in the centre of the chlorophyll pigment.
13. Glycolysis takes place in the __________________ of the cell.
14. _________________ is an obligate vernalization requiring plant.
15. The ultimate donor of electron in photosynthesis is _________________.
16. Answer all, each in about 50 words.                                     (5×1=5)
17. What is Glycolate pathway?
18. What is bioassay?

 

18. Define Respiratory Quotient.
19. Differentiate Apoplast and Symplast.
20. Explain interveinal chlorosis and mention its causes.

 

PART B

Answer the following, each within 500 words, Draw diagrams wherever necessary.       (5×7=35)

21. a) What is guttation?

(or)

1. b) Define water potential and bring out the relationship between matrix potential, osmotic potential and pressure potentials.
2. Explain how ammonia is assimilated in plants.

(or)

Draw and explain the symbiotic nitrogen fixation.

23. Differentiate between passive and active absorption of mineral ions and explain any one hypothesis for each.

(or)

Explain the mechanism of photorespiration.

24. Schematically represent the light reaction of photosynthesis and explain the important steps.

(or)

Bring out the differences between C₃ and C₄ plants.

25. What is dormancy of seeds? Explain the various causes of dormancy.

(or)

What is stress physiology?  Explain the causes of stress in plants.

PART C                                

Answer any Three of the following, each within 1500 words only.

Draw diagrams and flowcharts wherever necessary.                                                   (3×15=45)

 

26. Explain the Bioassay and physiological roles of auxins and gibberellins.
27. What are macro and micro nutrients? Explain the occurrence, deficiency symptoms and the roles of any three macro and any three micro nutrients.
28. Explain how a molecule of glucose is completely oxidized during aerobic respiration.
29. Explain the path way of C₃ photosynthesis and the significance of CAM plants.
30. Explain the structure and the mechanism of opening and closing of stomatal apparatus. Explain the various hypothesis associated with stomatal movement.

 

 

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & PLANT BIO-TECH.

FIFTH SEMESTER – APRIL 2012

PB 5515/PB 5509/PB 5500 – PLANT PHYSIOLOGY

 

 

 

Date : 25-04-2012              Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

 

PART A

 

Answer the following, each in about 50 words:                                             (10 x 2 = 20 marks)

1. Define the second law of thermodynamics.
2. Comment on antitranspirant.
3. What is an essential element?
4. Define Donnan’s equilibrium.
5. What are CAM plants?
6. What do you mean by photo synthetic phosphorylation?
7. Define the chemiosmotic hypothesis.
8. Define cellular oxidation.
9. What is water stress?
10. Define the term ‘dormanul’.

PART B                                                        

Answer the following, each within 500 words;

Draw diagrams wherever necessary:                                                               (5×7=35 marks)

11. a) Define water potential. Explain its components and bring out their relationships.

(OR)

1. b) Explain how K⁺ ions regulate the opening and closing of stomata.
2. a) What is active absorption of mineral ions? Explain any one concept of active absorption

of mineral ions.

(OR)

1.   b) What is passive absorption of mineral ions? Explain any one concept for passive

absorption of mineral ions.

13. a) Schematically represent the photorespiration, explain the important steps and the

significance of photorespiration.

(OR)

1. b) Schematically represent the light reaction and mention its importance.

 

 

14. a) Explain the mechanism of biological nitrogen fixation.

(OR)

1. b) Explain the various sources of nitrogen and the synthesis of amino acids.
2. a) What is bioassay? Explain any one bioassay for auxin and any one for gibberellins.

(OR)

1. Discuss the physiological roles of ethylene.

PART C                                

Answer any THREE of the following, each within 1200 words only;

Draw diagrams and flowcharts wherever necessary:                                      (3×15=45 marks)

 

16. Describe the path of water from the soil to the atmosphere.
17. Describe the function, deficiency symptoms and remedial measures of any four macro and

any four micro nutrients.

18. Explain how CO₂ is fixed in a C₃ plant. Bring out the differences between C₃ and C₄ plants.
19. Explain the oxidation of glucose molecule by aerobic respiration.
20. Write an essay on physiology of flowering.

 

 

 

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & PLANT BIO-TECH.

FIFTH SEMESTER – NOVEMBER 2012

PB 5515/5509/5500 – PLANT PHYSIOLOGY

 

 

 

Date : 01/11/2012             Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

 

PART – A

 

Answer the following, each with in 50 words each:                                          (10 x 2 = 20 marks)

 

1. What are Antitranspirants? Give an example.
2. What is Chemical potential?
3. What are Trace elements? Give examples.
4. Mention the deficiency symptoms of iron.
5. List the Photosynthetic pigments.
6. What is Photolysis of water?
7. What is substrate level phosphorylation?
8. Define reductive amination.
9. What is bioassay?
10. Mention the most important function of ethylene.

 

PART – B

 

Answer the following, each within 500 words each:

draw diagrams, flowcharts wherever necessary.                                         (5 x 7 = 35 marks)

 

11. a) Explain the apoplast and symplast concept.

(OR)

1. b) What is guttation? Bring out the differences between guttation and transpiration.
2. a) Discuss the importance of Nitrogen, Phosphorus and their deficiency symptoms.

(OR)

1. b) Draw and explain Donnan membrane equilibrium concept.
2. a) Schematically represent the light reaction and mention its importance.

(OR)

1. b) What are CAM plants? Explain the CAM pathway.
2. a) Explain the ATP synthesis through oxidative phosphorylation.

(OR)

1. b) Explain biological nitrogen fixation.

 

15. a) Explain any five physiological roles of auxins.

(OR)

1. b) What is seed dormancy? Explain the methods of breaking seed dormancy.

 

PART – C

 

Answer any THREE of the following, each within 1200 words. 

Draw diagrams and flowcharts wherever necessary.                                  (3 x 15 = 45 marks)

 

16. Explain the mechanism of stomatal movement and the various factors affecting it.
17. Explain the various concepts that will describe the absorption of mineral ions.
18. Explain the pathway of carbon fixation in C₄ plants. Bring out the differences between C₃

and C₄ plants.

19. Draw and explain the Kreb cycle.
20. Write an essay on the physiology of flowering.

 

 

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