BBYCT-137 PLANT PHYSIOLOGY AND METABOLISM in English Solved Question Paper December 2022

BBYCT-137 PLANT PHYSIOLOGY AND METABOLISM in English Solved Question Paper December 2022

PLANT PHYSIOLOGY AND METABOLISM
Course Code: BBYCT-137

1. (a) State whether the following statements are
true or false :
(i) As the root hair absorbs water from
the soil, its diffusion pressure deficit
(DPD) decreases.
(ii) Plant contains more phosphorus than
calcium.
(iii) Cobalt is readily mobile in the plant.
(iv) Some enzymes require additional
factors which are called cofactors.
(b) Fill in the blanks : 1×3=3
(i) In CAM plants stomata are closed
during ……………….
(ii) …………….. enzyme converts N2 to
NH3
(iii) Most of the membranes are permeable
to ……….. ion.
.
(c) Define the following terms : 1×5=5
(i) Osmosis
(ii) Stomatal frequency
(iii) Vernalization
(iv) Long day plant
(v) Respiratory quotient
2. Describe the ‘Z’ scheme or zig-zag scheme of
photosystem I and photosystem II working in
tandem with well labelled diagram. 10
3. (a) Discuss the criteria of essentiality of a
mineral nutrient. 3
(b) Define micronutrient and list any five
micronutrients and discuss the role of any
two micronutrients in plants. 7
4. Give a comparative account of Auxins,
Gibberellins and Cytokinins. 10
5. Describe the reaction of Kreb’s cycle indicating
the enzymes involved and sites of ATP
synthesis with labelled schematic diagram. 10
6. What is photoperiodism ? How are plants
classified on the basis of day length ? Discuss
the importance of dark period in flowering
plants. 2+5+3
7. (a) List the theories which are proposed to
explain mechanism of phloem transport,
and explain any one of them. 5
(b) What is biological stress ? List the various
types of biological stress, and describe any
one of them. 5
8. Write short notes on any two of the following :
(i) Biological clock
(ii) Chemosynthesis
(iii) Structure of Chlorophyll-a
(iv) Lock and key hypothesis for enzyme action