Which of these is the hormone gibberellin NOT commonly used for ?

ripening bananas ready for supermarket sale

bananas are often hung over fruit because

bananas produce ethene which accelerates fruit ripening

auxin affects shoot growth by

accelerating cell growth on the dark side of the shoot

the response of a shoot to light from one side is caused by

an uneven distribution of auxin hormone

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Plant responses/tropisms/hormones

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GCSE Biology/plant responses topic

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Questions 14

Answers

1
Plant roots are sensitive to
oxygen
light
temperature
gravity
2
This plant needs to flower in the shops just before Christmas. What is used to achieve this ?
ethene
Gibberellin
Auxin
mineral ions
3
Which of these is the hormone gibberellin NOT commonly used for ?
promoting flowering in commercially grown plants
ending seed dormancy in the brewing industry
ripening bananas ready for supermarket sale
increasing fruit size
4
fruit ripening is controlled by the chemical called
ethanol
ethane
ethene
ethanoic acid
5
bananas are often hung over fruit because
bananas produce auxins which stop the other fruit going bad
gibberellins in bananas stop other fruit ripening too soon
bananas produce ethene which accelerates fruit ripening
bananas produce ethene which slows ripening of other fruit
6
Plant shoots are sensitive to
temperature and light
light and gravity
gravity only
light only
7
Which hormone do some weed killers contain ?
ethene
gibberellin
thyroxine
auxin
8
gravitropism is also known as
phototropism
dendrotropism
hormonotropism
geotropism
9
the grapes on the left have been treated with
ethene
auxin
weed killer
gibberellin
10
This picture shows a cutting being prepared using the hormone
gibberellin
ethene
thyroxine
auxin
11
auxin affects shoot growth by
accelerating cell growth on the dark side of the shoot
accelerating growth on the light side of the shoot
decelerating groth on the light side of the shoot
accelerating growth in the tip
12
the response of a shoot to light from one side is caused by
an uneven distribution of auxin hormone
cells growing faster on the tip
cells dividing faster on the tip
a lack of auxin hormone
13
this picture shows which plant hormone in use ?
ethene
auxin
insulin
gibberellin
14
Tissue culture uses which hormone to accelerate growth ?
ethene
auxin
insulin
giberellin

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