Question 1

The F-box in the regulation system of giberellins facilitates

Accepted Answer

A)  protein breakdown to allow for the action of auxin. 
B)  the inactive state of growth-stimulating genes. 
C)  the inactivation of proteases. 
D)  the inhibition of the poly-ubiquitination of repressor proteins. 
E)  All of the above 
A)  protein breakdown to allow for the action of auxin. 
B)  the inactive state of growth-stimulating genes. 
C)  the inactivation of proteases. 
D)  the inhibition of the poly-ubiquitination of repressor proteins. 
E)  All of the above

Question 2

Which of the following may have the effect of breaking dormancy in seeds?

Accepted Answer

A)  Penetration of the seed coat 
B)  Leaching of inhibitory compounds by water 
C)  Exposure to fire 
D)  Passing through an animal's digestive tract 
E)  All of the above 
A)  Penetration of the seed coat 
B)  Leaching of inhibitory compounds by water 
C)  Exposure to fire 
D)  Passing through an animal's digestive tract 
E)  All of the above

Question 3

After a few days, a houseplant that has been accidentally knocked on its side will produce shoots that are growing upward relative to its new position. This phenomenon is called

Accepted Answer

A)  positive gravitropism. 
B)  negative gravitropism. 
C)  positive phototropism. 
D)  negative phototropism. 
E)  positive thigmotropism. 
A)  positive gravitropism. 
B)  negative gravitropism. 
C)  positive phototropism. 
D)  negative phototropism. 
E)  positive thigmotropism.

Question 4

The hormone _______ is responsible for the phenomenon of apical dominance in plants.

Accepted Answer

The answer of The hormone _______ is responsible for the...

Question 5

Which of the following is not initiated by auxin?

Accepted Answer

A)  Stimulation of root initiation 
B)  Inhibition of leaf abscission 
C)  Stimulation of leaf abscission 
D)  Maintenance of apical dominance 
E)  Auxin is involved in all of the above. 
A)  Stimulation of root initiation 
B)  Inhibition of leaf abscission 
C)  Stimulation of leaf abscission 
D)  Maintenance of apical dominance 
E)  Auxin is involved in all of the above.

Question 6

Use the following to answer questions:
Match the appropriate plant hormone from the list below with each description that follows. Each hormone may be used once, more than once, or not at all.
-The ripening hormone

Accepted Answer

A) Abscisic acid 
B) Auxin 
C) Cytokinin 
D) Ethylene 
E) Gibberellin 
A) Abscisic acid 
B) Auxin 
C) Cytokinin 
D) Ethylene 
E) Gibberellin

Question 7

The two-component cytokinin signal transduction pathway in plants is similar to that of

Accepted Answer

A)  viruses. 
B)  fungi. 
C)  many animals. 
D)  bacteria. 
E)  All of the above 
A)  viruses. 
B)  fungi. 
C)  many animals. 
D)  bacteria. 
E)  All of the above

Question 8

The mechanism by which gibberellins act involves

Accepted Answer

A)  the adding of proton pumps to the plasma membrane. 
B)  the phosphorylation of proteins. 
C)  binding with a transcription factor. 
D)  the removal of a repressor from a transcription factor. 
E)  None of the above 
A)  the adding of proton pumps to the plasma membrane. 
B)  the phosphorylation of proteins. 
C)  binding with a transcription factor. 
D)  the removal of a repressor from a transcription factor. 
E)  None of the above

Question 9

Which of the following does not aid in breaking seed dormancy?

Accepted Answer

A)  Fire 
B)  Low oxygen levels 
C)  Cycles of freezing and thawing 
D)  Leaching of inhibitor molecules 
E)  Soil microorganisms 
A)  Fire 
B)  Low oxygen levels 
C)  Cycles of freezing and thawing 
D)  Leaching of inhibitor molecules 
E)  Soil microorganisms

Question 10

Unlike other plant hormones, ethylene

Accepted Answer

A)  is not produced by all plants. 
B)  exerts a number of effects. 
C)  inhibits plant development. 
D)  acts either as an inhibitor or a promoter. 
E)  is a gas. 
A)  is not produced by all plants. 
B)  exerts a number of effects. 
C)  inhibits plant development. 
D)  acts either as an inhibitor or a promoter. 
E)  is a gas.

Question 11

Auxins are plant hormones that affect

Accepted Answer

A)  root initiation. 
B)  leaf abcission. 
C)  apical dominance. 
D)  cell expansion. 
E)  All of the above 
A)  root initiation. 
B)  leaf abcission. 
C)  apical dominance. 
D)  cell expansion. 
E)  All of the above

Question 12

Which one of the following treatments of seeds that require light for germination would promote germination?

Accepted Answer

A)  Treatment with blue light. 
B)  Treatment with red light. 
C)  Treatment with far-red light. 
D)  Treatment with red light then far-red light. 
E)  Treatment with blue light then far-red light. 
A)  Treatment with blue light. 
B)  Treatment with red light. 
C)  Treatment with far-red light. 
D)  Treatment with red light then far-red light. 
E)  Treatment with blue light then far-red light.

Question 13

The movement of auxin in plants is said to be "polar," which means that auxin

Accepted Answer

A)  is a chemically polar molecule. 
B)  is produced only in one part of the plant. 
C)  is transported from the tip to the base of the plant. 
D)  moves away from the light. 
E)  cannot move through gelatin. 
A)  is a chemically polar molecule. 
B)  is produced only in one part of the plant. 
C)  is transported from the tip to the base of the plant. 
D)  moves away from the light. 
E)  cannot move through gelatin.

Question 14

Which of the following light receptors is responsible for absorbing blue and ultraviolet light?

Accepted Answer

A)  Phytochrome Pr 
B)  Phytochrome Pfr 
C)  Cryptochrome 
D)  Phototropin 
E)  Etiolatin 
A)  Phytochrome Pr 
B)  Phytochrome Pfr 
C)  Cryptochrome 
D)  Phototropin 
E)  Etiolatin

Question 15

Genetic engineering has produced fruits that are deficient in the ability to produce ethylene. How is this deficiency useful in the storage and marketing of fruits?

Accepted Answer

Fruits can be kept from ripening until t

Question 16

Which of the following hormones is responsible for bud break in the spring in deciduous trees?

Accepted Answer

A)  Auxins 
B)  Cytokinins 
C)  Gibberellins 
D)  Ethylene 
E)  Brassinosteroids 
A)  Auxins 
B)  Cytokinins 
C)  Gibberellins 
D)  Ethylene 
E)  Brassinosteroids

Question 17

Which of the following processes is not increased by ethylene?

Accepted Answer

A)  Breakdown of fruit cell walls 
B)  Stimulation of leaf abscission 
C)  Ripening of fruit 
D)  Inhibition of stem elongation 
E)  Change in leaf color from green to red or yellow 
A)  Breakdown of fruit cell walls 
B)  Stimulation of leaf abscission 
C)  Ripening of fruit 
D)  Inhibition of stem elongation 
E)  Change in leaf color from green to red or yellow

Exam 37: Regulation of Plant Growth

The F-box in the regulation system of giberellins facilitates

Which of the following may have the effect of breaking dormancy in seeds?

After a few days, a houseplant that has been accidentally knocked on its side will produce shoots that are growing upward relative to its new position. This phenomenon is called

The hormone _______ is responsible for the phenomenon of apical dominance in plants.

Which of the following is not initiated by auxin?

Use the following to answer questions: Match the appropriate plant hormone from the list below with each description that follows. Each hormone may be used once, more than once, or not at all. -The ripening hormone

The two-component cytokinin signal transduction pathway in plants is similar to that of

The mechanism by which gibberellins act involves

Which of the following does not aid in breaking seed dormancy?

Unlike other plant hormones, ethylene

Auxins are plant hormones that affect

Which one of the following treatments of seeds that require light for germination would promote germination?

The movement of auxin in plants is said to be "polar," which means that auxin

Which of the following light receptors is responsible for absorbing blue and ultraviolet light?

Genetic engineering has produced fruits that are deficient in the ability to produce ethylene. How is this deficiency useful in the storage and marketing of fruits?

Which of the following hormones is responsible for bud break in the spring in deciduous trees?

Which of the following processes is not increased by ethylene?

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