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Question-1
Dwarfness can be controlled by treating the plant with
(A)
cytokinin
(B)
gibberellic acid
(C)
auxin
(D)
antigibberellin
Question-2
Geocarpic fruits are produced by
(A)
onion
(B)
watermelon
(C)
ground nut
(D)
carrot
Question-3
Hormone primarily connected with cell division
(A)
IAA
(B)
NAA
(C)
cytokinin/zeatin
(D)
gibberellic acid
Question-4
What reason will you assign for coconut milk used in tissue culture?
(A)
Gibberellins
(B)
Cytokinins
(C)
Auxins
(D)
Ethylene
Question-5
Highest auxin concentration occurs
(A)
in growing tips
(B)
in leaves
(C)
at base of plant organs
(D)
in xylem and phloem
Question-6
Abscisic acid controls
(A)
cell division
(B)
leaf fall and dormancy
(C)
shoot elongation
(D)
cell elongation and wall formation
Question-7
Phototropic and geotropic movements are linked to
(A)
gibberellins
(B)
enzymes
(C)
auxins
(D)
cytokinins
Question-8
Abscisic acid causes
(A)
stomatal closure
(B)
stem elongation
(C)
leaf expansion
(D)
root elongation
Question-9
The hormone responsible for apical dominance is
(A)
IAA
(B)
GA
(C)
ABA
(D)
florigen
Question-10
What will be the effect on phytochrome in a plant subjected to continuous red light?
(A)
Level of phytochrome decreases
(B)
Phytochrome is destroyed
(C)
Phytochrome synthesis increases
(D)
Destruction and synthesis of phytochrome remain in equilibrium
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Plus 2 Biology Science
ICSE/ISC
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