BBYCT-137 · December 2023 · English
IGNOU BBYCT-137 December 2023 Previous Year Question Paper
Plant Physiology And Metabolism
Structured previous year question paper for BBYCT-137, December 2023 session.
Max marks: 50 · Questions: 7
Verified: 29 Jul 2026
BACHELOR OF SCIENCE (GENERAL)
(BSCG)
Term-End Examination
December, 2023
BBYCT–137 : PLANT PHYSIOLOGY AND
METABOLISM
Time : 2 Hours Maximum Marks : 50
Note :
(i) Question No. 1 is compulsory.
(ii) Attempt any four questions from
Question No. 2 to 7.
Q1.(a) State whether the following statements are ‘True’ or ‘False’ : 4×1=4
(i) Hydrophilic amino acids create a water-free zone within protein molecules. [ 2 ] BBYCT–137
(ii) Wavelength greater than 700 nm are utilized by bacteria for photosynthesis.
(iii) The upward movement of water is known as the ascent of sap.
(iv) Uncompetitive inhibition is observed when substrate and inhibitor compete for the same active site of the enzyme.
(b) Fill in the blanks : 4×1=4
(i) The response of a plant part towards gravity is called
(ii) In leguminous plants, leghaemoglob in protects activity.
(iii) The net gain of ATP by complete oxidation of one glucose molecule is
(iv) Cells undergo plasmolysis when kept [ 3 ] BBYCT–137
(c) Match the items given under column ‘A’ with those given under column ‘B’ : 4× 2=2 Column A Column B
(1) Boron
(i) Component of ferrodoxin
(2) Molybdenum
(ii) Needed for synthesis of auxins
(3) Zinc
(iii) Component of nitrogenase
(4) Iron
(iv) Pollen germination
Q2.Differentiate between the following pairs of terms : 4×2 2=10
(i) Respiration and combustion
(ii) Imbibition and plasmolysis
(iii) Active and passive ion uptake
(iv) C3 and C4 plants
Q3.(a) Give a graphical account of glycolysis. 5
(b) Give an account of Z-scheme involving non- cycle and cyclic photophosphorylation. 5 [ 4 ]
Q4.(a) Discuss various factors that influence Nitrogenase activity. 5
(b) Discuss the importance of plant accessory pigments.
Q5.(a) Describe, how auxins, cytokinins and gibberellins affect plant growth. 5
(b) Define vernalization. How is it useful in agriculture ?
Q6.(a) Explain the polymer trapping model for symplastic loading of phloem. 5
(b) Explain the components of water potential.
Q7.Write short notes on any two of the following : 5×2=10
(i) Flowering hormones
(ii) Role of Iron and Boron in plants
(iii) Physiological function of Abscisic acid
(iv) Induced fit model of Enzyme [ 5 ] BBYCT–137 2023 –137 4×1=4 [ 6 ] BBYCT–137 4×1=4 ATP [ 7 ] BBYCT–137 2=2 4×2 2=10
(iv) C3 [ 8 ] BBYCT–137 5×2=
(10)