M.Sc. (Semester III) Examination Nov/Dec-2018
Botany
PLANT GROWTH AND DEVELOPMENT
Time: 2½ Hours Max. Marks: 70
Instructions: All questions are compulsory.
All questions carry equal marks.
Draw neat and labeled diagram wherever necessary.
Figures to the right indicate full marks.
Q.1 Rewrite the following sentences by choosing correct alternative 14
The term phytochrome was introduced by
Borthwick Borthwick and Hendricks
Moore Garner and Allard
Pollen grains do not germinate on the stigma of the same flower this
phenomenon is known as
Perpotency Self sterility
Dicliny Dichogamy
Programed cell death is scientifically known as
Automy Cell lysis
Apoptosis None of these
Growth regulator which retards senescence
Auxin GA
ABA Cytokinin
Seed dormancy can be broken by
ABA and ethylene Auxin and GA
GA and cytokinin Auxin and ABA
Metabolic precursor for the synthesis of ethylene is
Citric acid ketoglutaric acid
Succinic acid Methionine
Jasmonate plays role in
Inhibition of growth of plants Enhancement of growth of plants
Root initiation Breaking of seed dormancy
CCC is inhibitor of
GA biosynthesis Auxin biosynthesis
Kinetin biosynthesis None of the above
Callus is
Differentiated mass of tissue Undifferentiated mass of tissue
Injured tissue None of the above
10) Ripening of fruits can be fastened by treatment of
GA Cytokinin
Ethylene Auxin
11) ion play an important role in pollen tube growth.
Calcium Zinc
Nickel Phosphorus
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12) Polyamines are synthesized from amino acids and
Lysine and arginine Glycine and serine
Alanine and aspartate None of these
13) is a climacteric fruit.
Banana Apple
Mango All of these
14) is a long day plant.
Cocklebur
Biloxy variety of soyabean
Maryland mammoth variety of tobacco
Block henbane
Q.2 Answer the following (any four) 08
What is phytochrome?
Define senescence.
What is tissue culture?
Define plant growth regulators.
Give any two role of TIBA.
Write notes on (any two) 06
Cryptochrome
Physiology of pollination
Metabolism of stored seeds
Q.3 Answer the following (any two) 08
Explain in brief ripening of fruit.
Explain in brief role of tissue culture in physiology of plants.
Explain in brief discovery and mechanism action of salicylic acid.
Answer the following (any two) 06
Give role of mutant in plant physiology.
Give role of Maleic hydrazide.
Explain in brief discovery of Jasmonate.
Q.4 Answer the following (any two) 10
Describe in brief pollen stigma interaction.
Describe in brief polyamines.
Describe in brief secondary messengers.
Answer the following (any one) 04
Describe mechanism of programmed cell death.
Describe the biochemical changes during petal senescence.
Q.5 Answer the following (any two) 14
Describe the biochemical changes seen during leaf senescence.
Give an account of discovery, properties and role of phytochrome in plants.
Describe biochemistry of seed germination.