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Question-1
Which hormone promotes fruit ripening?
(A)
Auxin
(B)
Ethylene
(C)
Gibberellins
(D)
Cytokinin
Question-2
Chrysanthemum is an example of:
(A)
Long day plant
(B)
Short day plant
(C)
Day neutral plant
(D)
Vernalised plant
Question-3
The plant growth substance promoting cell division is:
(A)
Gibberellins
(B)
Cytokinins
(C)
Auxins
(D)
Ethylene
Question-4
Two growth substances may act together to produce a larger effect. This is known as:
(A)
Antagonism
(B)
Synergism
(C)
Metabolism
(D)
Anabolism
Question-5
Name the enzyme that catalyse the conversion of starch to maltose.
(A)
Amylase
(B)
Cymase
(C)
Isomerase
(D)
Ketase
Question-6
Which of the following is used for stem elongation?
(A)
Cytokinins
(B)
Gibberellins
(C)
ABA
(D)
Auxin
Question-7
Gibberellins promote seed germination by:
(A)
Activating the enzymes for respiration
(B)
Activating the process of inhibition
(C)
Activating the production of amylase
(D)
Activating cell division
Question-8
Farmers resort to smoking of unripe fruits for early ripening. This is because of the presence of:
(A)
Auxin
(B)
ABA
(C)
Ethylene
(D)
NAA
Question-9
Commercial use of synthetic auxin in cuttings is to stimulate the growth of:
(A)
Roots
(B)
Leaves
(C)
Flowers
(D)
Buds
Question-10
Two growth substances may reduce each others effect. This is known as:
(A)
Metabolism
(B)
Anabolism
(C)
Antagonism
(D)
Synergism
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Cambridge Advanced Grade 12
IGCSE
Practice in Related Chapters
Transport in Plants
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Enzymes
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Cell Division
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Reproduction in Animals
Gas Exchange
Evolution
Transport in Mammals
Respiration
Heterotrophic Nutrition
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