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Question-1
Which of the following is correct for auxin?
(A)
Ripening of fruits
(B)
Breaking of dormancy
(C)
Inhibition of flowering
(D)
Stimulation of root growth
Question-2
Parthenocarpic development of fruit is brought about by
(A)
2, 4-D
(B)
2,4,5-T
(C)
NAA, 2-T
(D)
NAA, 2, 4-D
Question-3
The pigment, involved in photomorphogenetic movement, is
(A)
Phytochrome
(B)
Cytochrome
(C)
Chlorophyll
(D)
Xanthophylls
Question-4
Plants deficient of Zinc, show its effects on biosynthesis of plant growth hormone
(A)
Auxin
(B)
Ethylene
(C)
Cytokinin
(D)
Abscisic acid
Question-5
Bud dormancy is induced by
(A)
ABA
(B)
IAA
(C)
Ethylene
(D)
Gibberalic acid
Question-6
Growth movements, in response to light, are called
(A)
Photolysis
(B)
Phototrophism
(C)
Photoperiodism
(D)
Photo synthesis
Question-7
Removal of seed coat in dormant seeds, by mechanical methods, is called
(A)
Separation
(B)
Vernalization
(C)
Emasculation
(D)
Scarification
Question-8
Which of the following combination of gases is suitable for fruit ripening?
(A)
80% CH4 and 20% CO2
(B)
80% CO2 and 20% O2
(C)
80% C2H4 and 20% CO2
(D)
80% CO2 and 20% CH2
Question-9
Which of the following hormone is responsible for senescence?
(A)
GA
(B)
ABA
(C)
Auxin
(D)
Cytokinin
Question-10
Which of the following pigment is sensitive to red and far red (infra-red) light?
(A)
Cytochrome
(B)
Phytochrome
(C)
Phyllotaxis
(D)
None of these
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Plus 2 Biology Science
ICSE/ISC
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