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Question-1
A growth response to touch is known as:
(A)
Gravitropism
(B)
Thigmotropism
(C)
Chemotropism
(D)
Geotropism
Question-2
Name the growth substance used as weedkiller (weedicide).
(A)
Auxin
(B)
ABA
(C)
IBA
(D)
2, 4 , D
Question-3
Dormin refers to:
(A)
Auxin
(B)
NAA
(C)
IAA
(D)
ABA
Question-4
Which plant growth substance promote stomatal closure?
(A)
ABA
(B)
Auxin
(C)
Gibberellins
(D)
Ethylene
Question-5
The plant growth substance promoting cell division is:
(A)
Gibberellins
(B)
Cytokinins
(C)
Auxins
(D)
Ethylene
Question-6
Choose the correct statement from the following.
(A)
In dark there is more P
fr
than P
r
(B)
In dark, there is more P
r
than P
fr
(C)
In dark no P
r
or P
fr
(D)
In light, there is more P
r
than P
fr
Question-7
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-8
Two growth substances may act together to produce a larger effect. This is known as:
(A)
Antagonism
(B)
Synergism
(C)
Metabolism
(D)
Anabolism
Question-9
Went's experiments were done with shoots of:
(A)
Oats
(B)
Barley
(C)
Rice
(D)
Wheat
Question-10
Name the enzyme which catalyses the conversion of starch to maltose.
(A)
Amylase
(B)
Cymase
(C)
Isomerase
(D)
Ketase
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Cambridge Advanced Grade 11
IGCSE
Practice in Related Chapters
The Molecules of Life
Regulations and Control
DNA and Protein Synthesis
Enzymes
Genetics
Cell
Cell Division
Photosynthesis And Plant Nutrition
Animal Nutrition
Reproduction in Animals
Ecology
Heterotrophic Nutrition
Gas Exchange
Evolution
Transport in Mammals
Transport in Plants
Respiration
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