Question 1

The transport of auxin is

Accepted Answer

A)  multidirectional in shoots. 
B)  a completely passive process. 
C)  polar from base to apex in coleoptiles. 
D)  polar from apex to stem in coleoptiles. 
E)  not dependent on membrane transporters. 
A)  multidirectional in shoots. 
B)  a completely passive process. 
C)  polar from base to apex in coleoptiles. 
D)  polar from apex to stem in coleoptiles. 
E)  not dependent on membrane transporters. D

Question 2

Brassinosteroids were first discovered in the pollen of rape, from the _______ family.

Accepted Answer

A)  lily 
B)  mustard 
C)  tomato 
D)  grape 
E)  maple 
A)  lily 
B)  mustard 
C)  tomato 
D)  grape 
E)  maple B

Question 3

Like gibberellins, brassinosteroids promote

Accepted Answer

A)  seed germination. 
B)  root formation. 
C)  leaf abscission. 
D)  shoot bud formation. 
E)  apical dominance. 
A)  seed germination. 
B)  root formation. 
C)  leaf abscission. 
D)  shoot bud formation. 
E)  apical dominance. A

Question 4

Refer to the figure below.   Germination is often stimulated by environmental factors, including the presence of _______, which allows _______ (the first step in the germination process of most seeds).

Accepted Answer

A)  fire; combustion 
B)  smoke; fumigation 
C)  water; imbibition 
D)  water; irrigation 
E)  ethylene; senescence 
A)  fire; combustion 
B)  smoke; fumigation 
C)  water; imbibition 
D)  water; irrigation 
E)  ethylene; senescence

Question 5

Seeds of a plant that is native to Mexico are released in mid-spring just as their native habitat is drying out and becoming unfavorably hot.They are quiescent after they are released.This example demonstrates that seed quiescence usually helps ensure that

Accepted Answer

A)  the embryo is mature. 
B)  germination occurs at a favorable time. 
C)  seeds germinate near the parent plant. 
D)  levels of abscisic acid are high enough for seed germination. 
E)  many seeds are ready to germinate. 
A)  the embryo is mature. 
B)  germination occurs at a favorable time. 
C)  seeds germinate near the parent plant. 
D)  levels of abscisic acid are high enough for seed germination. 
E)  many seeds are ready to germinate.

Question 6

In early experiments, what showed that auxin was water soluble?

Accepted Answer

A)  It could diffuse through the air. 
B)  It could diffuse into and through a block of gelatin. 
C)  It could help in responding to blue light. 
D)  It could help in responding to red light. 
E)  It was a small organic molecule. 
A)  It could diffuse through the air. 
B)  It could diffuse into and through a block of gelatin. 
C)  It could help in responding to blue light. 
D)  It could help in responding to red light. 
E)  It was a small organic molecule.

Question 7

Which statement about the mechanism by which phytochrome activates gene transcription is false?

Accepted Answer

A)  Pr binds to transcription factors. 
B)  Pfr has protein kinase activity. 
C)  Pfr has an exposed NLS domain. 
D)  The conformation of Pr is altered by the absorption of red light by the pigment bound to the protein. 
E)  Pfr can bind directly to transcription factors. 
A)  Pr binds to transcription factors. 
B)  Pfr has protein kinase activity. 
C)  Pfr has an exposed NLS domain. 
D)  The conformation of Pr is altered by the absorption of red light by the pigment bound to the protein. 
E)  Pfr can bind directly to transcription factors.

Question 8

Refer to the figure below.   What is the name of structure indicated by the letter "A"? Which hormones control its formation?

Accepted Answer

The apical hook; its formation

Question 9

Different wavelengths of light on the color spectrum can affect the growth and development of a plant.These light signals are perceived by what kind of protein?

Accepted Answer

A)  Hormone receptor 
B)  Photoreceptor 
C)  Transcription factor 
D)  Pigment 
E)  Enzyme 
A)  Hormone receptor 
B)  Photoreceptor 
C)  Transcription factor 
D)  Pigment 
E)  Enzyme

Question 10

The part of monocot seedlings that was critical in early studies of phototropism and auxin is the

Accepted Answer

A)  coleoptile. 
B)  coleorhiza. 
C)  radicle. 
D)  plumule. 
E)  cotyledon. 
A)  coleoptile. 
B)  coleorhiza. 
C)  radicle. 
D)  plumule. 
E)  cotyledon.

Question 11

A newly excavated archaeological site contains a jar of seeds, which, after soaking for one week in warm water, germinate at 5 percent of the total number of seeds.Those seeds were

Accepted Answer

A)  resting. 
B)  quiescent. 
C)  inactive. 
D)  in reserve. 
E)  suspended. 
A)  resting. 
B)  quiescent. 
C)  inactive. 
D)  in reserve. 
E)  suspended.

Question 12

To create a genetic screen to study plant hormones, one must create what kind of unusual plants?

Accepted Answer

A)  Arabidopsis 
B)  Genomic 
C)  Mutant 
D)  Chimeric 
E)  Agricultural cultivars 
A)  Arabidopsis 
B)  Genomic 
C)  Mutant 
D)  Chimeric 
E)  Agricultural cultivars

Question 13

Gibberellins were discovered by the biologist Eiichi Kurosawa while he was studying a fungal infection of _______, in which seedlings _______.

Accepted Answer

A)  corn; grow unusually slowly 
B)  rice; grow into tall, spindly plants 
C)  wheat; die after germination 
D)  barley; produce seeds unusually early 
E)  millet; have a beneficial mutation 
A)  corn; grow unusually slowly 
B)  rice; grow into tall, spindly plants 
C)  wheat; die after germination 
D)  barley; produce seeds unusually early 
E)  millet; have a beneficial mutation

Question 14

Seeds from plants native to a place with hot summers and cold winters would probably need what kind of treatment to promote their germination?

Accepted Answer

A)  Abrasion 
B)  Exposure to heat 
C)  Exposure to cold 
D)  Exposure to dry conditions 
E)  Smoke 
A)  Abrasion 
B)  Exposure to heat 
C)  Exposure to cold 
D)  Exposure to dry conditions 
E)  Smoke

Question 15

Treatment of some plants with gibberellins or auxin causes parthenocarpy, which is the formation of

Accepted Answer

A)  flowers that lack embryos. 
B)  seeds that lack embryos. 
C)  fruit with only one seed instead of many. 
D)  fruit without fertilization. 
E)  an embryo without fertilization. 
A)  flowers that lack embryos. 
B)  seeds that lack embryos. 
C)  fruit with only one seed instead of many. 
D)  fruit without fertilization. 
E)  an embryo without fertilization.

Question 16

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

Accepted Answer

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

Question 17

Which plant hormone stimulates axillary buds to grow into branches?

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 18

The size of seedless grapes can be increased by using which group of plant hormones, applied exogenously?

Accepted Answer

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

Question 19

A plant grows toward a directional light when auxin moves to the (lighted/shaded) _______ side.This has the effect of expanding the cell walls in that region, causing asymmetric growth and, thus, bending.

Accepted Answer

The answer of A plant grows toward a directional light...

Question 20

The prephotosynthetic seedling must survive using resources from the _______ or the _______.

Accepted Answer

A)  cotyledons; endosperm 
B)  radicle; hypocotyl 
C)  foliage leaf; epicotyl 
D)  seed coat; coleoptile 
E)  apical hook; secondary roots 
A)  cotyledons; endosperm 
B)  radicle; hypocotyl 
C)  foliage leaf; epicotyl 
D)  seed coat; coleoptile 
E)  apical hook; secondary roots

Exam 36: Regulation of Plant Growth

The transport of auxin is

Brassinosteroids were first discovered in the pollen of rape, from the _______ family.

Like gibberellins, brassinosteroids promote

Refer to the figure below. Germination is often stimulated by environmental factors, including the presence of _______, which allows _______ (the first step in the germination process of most seeds).

Seeds of a plant that is native to Mexico are released in mid-spring just as their native habitat is drying out and becoming unfavorably hot.They are quiescent after they are released.This example demonstrates that seed quiescence usually helps ensure that

In early experiments, what showed that auxin was water soluble?

Which statement about the mechanism by which phytochrome activates gene transcription is false?

Refer to the figure below. What is the name of structure indicated by the letter "A"? Which hormones control its formation?

Different wavelengths of light on the color spectrum can affect the growth and development of a plant.These light signals are perceived by what kind of protein?

The part of monocot seedlings that was critical in early studies of phototropism and auxin is the

A newly excavated archaeological site contains a jar of seeds, which, after soaking for one week in warm water, germinate at 5 percent of the total number of seeds.Those seeds were

To create a genetic screen to study plant hormones, one must create what kind of unusual plants?

Gibberellins were discovered by the biologist Eiichi Kurosawa while he was studying a fungal infection of _______, in which seedlings _______.

Seeds from plants native to a place with hot summers and cold winters would probably need what kind of treatment to promote their germination?

Treatment of some plants with gibberellins or auxin causes parthenocarpy, which is the formation of

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

Which plant hormone stimulates axillary buds to grow into branches?

The size of seedless grapes can be increased by using which group of plant hormones, applied exogenously?

A plant grows toward a directional light when auxin moves to the (lighted/shaded) _______ side.This has the effect of expanding the cell walls in that region, causing asymmetric growth and, thus, bending.

The prephotosynthetic seedling must survive using resources from the _______ or the _______.

Studying Life

Small Molecules and the Chemistry of Life

Proteins, Carbohydrates, and Lipids

Nucleic Acids and the Origin of Life

Cells: the Working Units of Life

Cell Membranes

Cell Communication and Multicellularity

Energy, Enzymes, and Metabolism

Pathways That Harvest Chemical Energy

Photosynthesis: Energy From Sunlight

The Cell Cycle and Cell Division

Inheritance, Genes, and Chromosomes

Dna and Its Role in Heredity

From Dna to Protein: Gene Expression

Gene Mutation and Molecular Medicine

Regulation of Gene Expression

Genomes

Recombinant Dna and Biotechnology

Mechanisms of Evolution

Reconstructing and Using Phylogenies

Speciation

Evolution of Genes and Genomes

The History of Life on Earth

Bacteria, Archaea, and Viruses

The Origin and Diversification of Eukaryotes

Plants Without Seeds: From Water to Land

The Evolution of Seed Plants

The Evolution and Diversity of Fungi

Animal Origins and the Evolution of Body Plans

Protostome Animals

Deuterostome Animals

The Plant Body

Transport in Plants

Plant Nutrition

Reproduction in Flowering Plants

Plant Responses to Environmental Challenges

Physiology, Homeostasis, and Temperature Regulation

Animal Hormones

Immunology: Animal Defense Systems

Animal Reproduction

Animal Development

Neurons, Glia, and Nervous Systems

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The Mammalian Nervous System: Structure and Higher Functions

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Salt and Water Balance and Nitrogen Excretion

Animal Behavior

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Refer to the figure below. Germination is often stimulated by environmental factors, including the presence of _, which allows _ (the first step in the germination process of most seeds).

Gibberellins were discovered by the biologist Eiichi Kurosawa while he was studying a fungal infection of _, in which seedlings _.

The prephotosynthetic seedling must survive using resources from the _ or the _.