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Question-1
The plant growth substance promoting cell division is:
(A)
Gibberellins
(B)
Cytokinins
(C)
Auxins
(D)
Ethylene
Question-2
Name the growth substance used as weedkiller (weedicide).
(A)
Auxin
(B)
ABA
(C)
IBA
(D)
2, 4 , D
Question-3
Name the enzyme which catalyses the conversion of starch to maltose.
(A)
Amylase
(B)
Cymase
(C)
Isomerase
(D)
Ketase
Question-4
Which plant growth substance promote stomatal closure?
(A)
ABA
(B)
Auxin
(C)
Gibberellins
(D)
Ethylene
Question-5
For flowering, long day plants need:
(A)
Lengthy day period
(B)
Lengthy dark period
(C)
Short day period
(D)
Neutral
Question-6
Gardeners pinch out apical bud to keep:
(A)
Plants healthy
(B)
Plants grow taller
(C)
Plants small and bushy
(D)
Plants to produce meristem
Question-7
A growth response to touch is known as:
(A)
Gravitropism
(B)
Thigmotropism
(C)
Chemotropism
(D)
Geotropism
Question-8
Chrysanthemum is an example of :
(A)
Long day plant
(B)
Short day plant
(C)
Day neutral plant
(D)
Vernalised plant
Question-9
Which of the following promote abscission of leaves?
(A)
Auxins
(B)
Ethylene
(C)
ABA
(D)
NAA
Question-10
Which of the following is "stress hormone"?
(A)
Auxin
(B)
2, 4, D
(C)
ABA
(D)
Ethylene
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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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