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Question-1
The dormancy of seeds is due to the involvement of
(A)
Gibberellin
(B)
Ethylene
(C)
Cytokinins
(D)
Abscisic acid
Question-2
Which of the following plant hormones stimulates the synthesis of a-amylase?
(A)
Auxin
(B)
Ethylene
(C)
Gibberellin
(D)
Abscisic acid
Question-3
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
Question-4
The hormone responsible for ripening of fruit is
(A)
ABA
(B)
Auxin
(C)
Ethylene
(D)
Cytokinin
Question-5
Which of the following hormone is responsible for senescence?
(A)
GA
(B)
ABA
(C)
Auxin
(D)
Cytokinin
Question-6
What will be the effect on phytochrome in a plant subjected to a continuous light?
(A)
Increase in phytochrome
(B)
Decrease in phytochrome
(C)
Change in the level of phytochrome
(D)
Change into other phytochrome type
Question-7
The growth of plant is
(A)
Limited
(B)
Unlimited
(C)
Unlocalised
(D)
None of these
Question-8
Which of the following is a gaseous plant growth regulator?
(A)
GA
(B)
ABA
(C)
Kinetin
(D)
Ethylene
Question-9
The hormone, which controls cell division and cell differentiation, is
(A)
ABA
(B)
Auxin
(C)
Gibberllin
(D)
Cytokinin
Question-10
The 2, 4-D is an effective
(A)
Fungicide
(B)
Weedicide
(C)
Rodenticide
(D)
Wormicide
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Plus 2 Biology Science
ICSE/ISC
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