BBYCT-137 PLANT PHYSIOLOGY AND METABOLISM in English Solved Question Paper June 2023

BBYCT-137 PLANT PHYSIOLOGY AND METABOLISM in English Solved Question Paper June 2023

PLANT PHYSIOLOGY AND METABOLISM
Course Code: BBYCT-137

1. (a) State whether the following statements are
true or false : 4×1=4
(i) The water potential is less negative in
the xylem than in the soil water.
(ii) Both cyclic and non-cyclic electron
transport operate in photosynthetic
bacteria.
(iii) In Cyanobacteria, Nitrate reductase is
located in the photosynthetic
membranes.
(iv) The sources and sinks for solute
transport are always fixed.
(b) Fill in the blanks : 4×1=4
(i) The source of O2 liberated in
photosynthesis is ……………. .
(ii) The upward movement of water is
known as …………….. .
(iii) In the rainy season, the wood of doors
gets swelled up due to …………….. .
(iv) …………. and …………. ions are required
for chlorophyll synthesis.
(c) Match the items given under Column ‘A’
with those given under Column ‘B’ :
Column ‘A’ Column ‘B’
(a) Molecular
Oxygen
(i) Ketoglutarate
(b) Electron
Acceptor
(ii) Acetyl CoA
(c) Pyruvate
dehydrogenase
(iii) Cytochrome C
(d) Decarboxylase (iv) Hydrogen
Acceptor
2. Differentiate between the following pairs of
terms :
(i) Photophosphorylation and Oxidative
phosphorylation
(ii) Competitive and Non-competitive
inhibition
(iii) Diffusion and Osmosis
(iv) C3 and C4 plants
3. Explain Krebs cycle. Highlight the metabolic
intermediates and sites for NADH, FADH2 and
ATP production. 10
4. (a) Define the term ‘Vernalization’. What role
does it play in agriculture ? 5
(b) Explain active transport of metabolites
through ionic pumps. 5
5. (a) Explain the mechanism of allosteric
enzyme regulation. 5
(b) Discuss the mechanism of opening and
closing of stomata. 5
6. (a) Discuss the functions of essential elements.
5
(b) What is stress ? Discuss temperature
induced stress. 5
7. Write short notes on any two of the following :
5×2=10
(i) Protoosmotic model for phloem transport
(ii) Photorespiration
(iii) Bioassays for auxins
(iv) Phytochrome-mediated responses