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Question-1
For flowering, long day plants need:
(A)
Lengthy day period
(B)
Lengthy dark period
(C)
Short day period
(D)
Neutral
Question-2
Which plant growth substance promote stomatal closure?
(A)
ABA
(B)
Auxin
(C)
Gibberellins
(D)
Ethylene
Question-3
Name the growth substance used as weedkiller (weedicide).
(A)
Auxin
(B)
ABA
(C)
IBA
(D)
2, 4 , D
Question-4
Which of the following is "stress hormone"?
(A)
Auxin
(B)
2, 4, D
(C)
ABA
(D)
Ethylene
Question-5
The first auxin to be discovered was:
(A)
Indole Acetic Acid (IAA)
(B)
Indole Butyric Acid (IBA)
(C)
Naphthalene Acetic Acid (NAA)
(D)
2, 4, D
Question-6
Which of the following is a gaseous plant growth substance?
(A)
Ethylene
(B)
Auxin
(C)
IBA
(D)
ABA
Question-7
Name the enzyme which catalyses the conversion of starch to maltose.
(A)
Amylase
(B)
Cymase
(C)
Isomerase
(D)
Ketase
Question-8
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-9
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-10
The plant growth substance promoting cell division is:
(A)
Gibberellins
(B)
Cytokinins
(C)
Auxins
(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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