M.Sc. (Semester III) (CBCS) Examination Oct/Nov-2017
Botany
PLANT GROWTH DEVELOPMENT
Day Date: Saturday, 25-11-2017 Max. Marks: 70
Time: 02.30 PM to 05.00 PM
Instructions: Attempt total five questions.
Question No.1 is compulsory.
Attempt any two questions from question No.2 to 4.
Attempt any two questions from question No.5 to 7.
Figures to the right given indicate full marks.
Q.1 Choose the correct answer (one mark each): 14
Growth hormone used for inducing morphogenesis in plant tissue culture.
ABA GA
Ethylene Cytokinin
Leaf abscission leads to
Growth of leaf Elongation of leaf
Senescence of leaf All of these
Which of following is gaseous growth hormone?
Ethylene ABA
G.A. Cytokinin
PGR is nothing but
Protein growing rate Plant growing rate
Plant growth regular None of these
Phytochrome is responsible for
Respiration Photosynthesis
Flowering Transpiration
Causes of senescence in plant are
Increase in chlorophyll amount
Decrease in Chloroplast enzyme
Increase in RNA content
None of these
Secondary messenger molecules involved in many signal transduction
pathways in plantsa)
CAMP CGMP
Inositol All of these
During seed germination starch converts into
Amides Acetyl co-A
Enzymes Sucrose
Role of triacontanol is in
Plant growth stimulator Plant growth suppressor
Tolescence of stress Tulescence of pathogens.
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SLR-E-33
10) Which of the following pair is a senescence promoter?
Ethylene and Cytokinin Ethylene and ABA
Ethytene and Auxin Auxin and cycolesnin
11) During fruit ripening role ethylene is
Inhibitor Stimulator
Inhibitor and Stimulator None of these
12) Crypto chrome gives response to
Red light Blue light
Green light White light
13) Main essential factor for metabolic changes during seed germination

Light Water
Dark All of these
14) TIBA is an
A chemical messenger
An ion that's alters turgour pressure
Secondary metabolic compound d
All of these
Section II
Q.2 Give an account of role of crypto chrome played in flowering plant. 07
Write the mechanism of action of salicylic acid and its use in agriculture. 07
Q.3 Give an idea about programmed cell death. 07
Explain physiology of ripening of fruit. 07
Q.4 What is senescence? Add note on biochemical changes occurs in leaf
senescence.
07
CAMP as a second messenger in plants. 07
Section III
Q.5 Describe:
Role of mutant in physiological studies. 05
Mechanism of action of cryptochrome. 05
Role of Maleic hydrazide in agriculture India. 04
Q. 6 Explain
Physiology of seed development. 04
Role of polyamines in plant growth. 05
Properties of phytochrome. 05
Q. 7 Write note on any three: 14
Metabolic changes during seed germination.
Role of TIBA.
Signal transduction
Motabolism of stored seeds