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question_answer1)
Abscisic acid controls [CBSE PMT 1990, 99; EAMCET 1995]
A)
Shoot elongation done
clear
B)
Cell elongation and cell wall formation done
clear
C)
Cell division done
clear
D)
Leaf fall and dormancy done
clear
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question_answer2)
The following is a naturally occuring growth inhibitors [CPMT 1981, 84, 96; AFMC 1980; AMU 1986; JIPMER 1986]
A)
IAA done
clear
B)
ABA done
clear
C)
NAA done
clear
D)
GA done
clear
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question_answer3)
Which of the following is a plant hormone
A)
Dormin done
clear
B)
Formalin done
clear
C)
Acetylene done
clear
D)
All the above done
clear
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question_answer4)
Wound hormone is called
A)
Necrohormone done
clear
B)
Hormone only done
clear
C)
Auxins done
clear
D)
Phyllocaline done
clear
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question_answer5)
Maleic hydrazide is used to
A)
To prolong dormancy done
clear
B)
To break dormancy done
clear
C)
Both [a] and [b] done
clear
D)
None of the above done
clear
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question_answer6)
'Dormin' is a
A)
Growth promotor done
clear
B)
Auxin done
clear
C)
Abscisic acid done
clear
D)
None of the above done
clear
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question_answer7)
'Morphactins' are
A)
Synthetic growth regulators done
clear
B)
Synthetic auxins done
clear
C)
Synthetic gibberellins done
clear
D)
None of the above done
clear
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question_answer8)
Elongation of internodes is inhibited by
A)
Gibberellins done
clear
B)
Morphactins done
clear
C)
Both [a] and [b] done
clear
D)
None of the above done
clear
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question_answer9)
Abscission zone may be induced to be formed by
A)
Auxins done
clear
B)
Gibberellins done
clear
C)
Cytokinins done
clear
D)
Abscisic acid done
clear
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question_answer10)
Formative hormone is
A)
Calines done
clear
B)
Traumatic acid done
clear
C)
Both [a] and [b] done
clear
D)
None of the above done
clear
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question_answer11)
Presence of which of the following in seed is associated with dormancy [DPMT 1982; CBSE PMT 1999; BVP 2002]
A)
Starch done
clear
B)
Abscisic acid done
clear
C)
Ethylene done
clear
D)
Gibberellic acid done
clear
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question_answer12)
Abscisic acid treatment results in [CBSE PMT 1991]
A)
Leaf expansion done
clear
B)
Stem elongation done
clear
C)
Stomatal closure done
clear
D)
Root elongation done
clear
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question_answer13)
Xanthoxin is a
A)
Auxin done
clear
B)
Gibberellin done
clear
C)
Cytokinin done
clear
D)
Dormin done
clear
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question_answer14)
ABA possesses
A)
One symmetric carbon atom done
clear
B)
One asymmetric carbon atom done
clear
C)
One symmetric and two asymmetric carbon atoms done
clear
D)
One asymmetric and two symmetric carbon atoms done
clear
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question_answer15)
Abscissic acid (ABA) promotes
A)
Cell division done
clear
B)
Leaf fall done
clear
C)
Germination done
clear
D)
Budding done
clear
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question_answer16)
Which hormone is present in the pulp of fruit, seed coat and resting buds
A)
IAA done
clear
B)
BA done
clear
C)
GA done
clear
D)
ABA done
clear
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question_answer17)
When a plant faces scarcity of water, which of the following hormone is synthesized in its mesophyll tissue
A)
Auxin done
clear
B)
Gibberellin done
clear
C)
Cytokinin done
clear
D)
Abscissic acid done
clear
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question_answer18)
ABA is involved in [CBSE PMT 1999]
A)
Dormancy of seeds done
clear
B)
Root elongation done
clear
C)
Shoot elongation done
clear
D)
Increased cell division done
clear
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question_answer19)
Which of the following hormone is produced during leaf fall [CPMT 1998]
A)
ABA done
clear
B)
Cytokinin done
clear
C)
Florigen done
clear
D)
All of the above done
clear
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question_answer20)
Which of the following hormone is responsible for senescence [CBSE PMT 2001]
A)
GA done
clear
B)
ABA done
clear
C)
Auxin done
clear
D)
Cytokinin done
clear
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question_answer21)
One of the most commonly detected inhibitor of germination is [JIPMER 2002]
A)
Gibberellic acid done
clear
B)
Abscisic acid done
clear
C)
Pantothenic acid done
clear
D)
Tartaric acid done
clear
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question_answer22)
Bud dormancy is induced by [AIIMS 1999, 2002]
A)
ABA done
clear
B)
IAA done
clear
C)
Ethylene done
clear
D)
Gibberellic acid done
clear
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question_answer23)
Phytotron is [CPMT 2003]
A)
Fish culture done
clear
B)
Plant hormone done
clear
C)
Animal hormone done
clear
D)
None of these done
clear
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question_answer24)
Abscisic acid (ABA) is a stress related hormone and it also [MHCET 2000]
A)
Aids in fruit development done
clear
B)
Accelerates fruit ripening done
clear
C)
Stimulates mitosis done
clear
D)
Mediated stomatal closure done
clear
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question_answer25)
Which one of the following plant hormones is known as a stress hormone [MHCET 2000]
A)
Gibberellins done
clear
B)
Kinetin done
clear
C)
Auxin done
clear
D)
Abscisic acid done
clear
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question_answer26)
Leaf abscission, fruit fall, bud dormancy occurs by which phytohormone [AFMC 2004]
A)
Auxin done
clear
B)
Cytokinin done
clear
C)
Gibberellins done
clear
D)
Abscisic acid done
clear
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question_answer27)
Hormone causing stomatal closure is [Orissa JEE 2005]
A)
GA done
clear
B)
Kinetin done
clear
C)
ABA done
clear
D)
IBA done
clear
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question_answer28)
The shedding of leaves, flowers or fruits due to change in the hormonal balance is plant is referred as [J&K CET 2005]
A)
Senescence done
clear
B)
Abscission done
clear
C)
Photoperiodism done
clear
D)
Vernalisation done
clear
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question_answer29)
Which is true [Haryana PMT 2005]
A)
ABA open stomata done
clear
B)
ABA and cytiokinin does not effect on stomata done
clear
C)
ABA open, cytokinin close stomata done
clear
D)
ABA close and cytokinin open the stomata done
clear
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question_answer30)
Which phytohormone is situated on its synthesis site [AMU 2005]
A)
Gibberellin done
clear
B)
Auxin done
clear
C)
Ethylene done
clear
D)
ABA done
clear
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question_answer31)
In the extreme drought condition which of the following plant hormone is produced due to which stomata closes [AMU 2005]
A)
ABA done
clear
B)
I.A.A done
clear
C)
Gibberellin done
clear
D)
Ascorbic acid done
clear
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