Question 1

When tobacco pith callus is treated with higher concentrations of auxin than kinetin, ______ is(are) formed.

Accepted Answer

A) more callus 
B) roots 
C) buds 
D) leaves 
E) vascular tissue 
A) more callus 
B) roots 
C) buds 
D) leaves 
E) vascular tissue

Question 2

In Arabidopsis, the ethylene receptor is located in the:

Accepted Answer

A) endoplasmic reticulum. 
B) plasma membrane. 
C) Golgi apparatus. 
D) chloroplast. 
E) nucleus. 
A) endoplasmic reticulum. 
B) plasma membrane. 
C) Golgi apparatus. 
D) chloroplast. 
E) nucleus.

Question 3

_________ have recently been ranked along with the "classic five" as a major class of plant hormone.

Accepted Answer

A) Systemins 
B) Florigens 
C) Brassinosteroids 
D) Salicylic acids 
E) Jasmonates 
A) Systemins 
B) Florigens 
C) Brassinosteroids 
D) Salicylic acids 
E) Jasmonates

Question 4

In etiolated pea seedlings, ethylene causes ______ longitudinal growth, ______ radial expansion of epicotyls, and ______ growth of epicotyls.

Accepted Answer

A) increased; increased; horizontal 
B) increased; decreased; horizontal 
C) decreased; increased; horizontal 
D) decreased; increased; angular 
E) increased; decreased; angular 
A) increased; increased; horizontal 
B) increased; decreased; horizontal 
C) decreased; increased; horizontal 
D) decreased; increased; angular 
E) increased; decreased; angular

Question 5

In the acid-growth hypothesis of cell wall extensibility, which of the following events occurs FIRST?

Accepted Answer

A) Expansins disrupt hydrogen bonds. 
B) Protons are pumped into the cell wall. 
C) Specific genes are activated. 
D) A proton-pumping enzyme is activated. 
E) Cross-links between noncellulosic polysaccharides are broken. 
A) Expansins disrupt hydrogen bonds. 
B) Protons are pumped into the cell wall. 
C) Specific genes are activated. 
D) A proton-pumping enzyme is activated. 
E) Cross-links between noncellulosic polysaccharides are broken.

Question 6

The transport of auxin can be nonpolar as well as polar.

Accepted Answer

A) True 
 B)False

Question 7

An excised leaf floated in a kinetin solution will remain green longer than a leaf floated in water.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following is a phenolic compound with a structure similar to aspirin?

Accepted Answer

A) systemin 
B) florigen 
C) brassinosteroids 
D) salicylic acids 
E) jasmonic acid 
A) systemin 
B) florigen 
C) brassinosteroids 
D) salicylic acids 
E) jasmonic acid

Question 9

In isolated barley aleurone cells, treatment with GA causes the levels of α-amylase to ______, and treatment with ABA causes the levels to ______.

Accepted Answer

A) increase; remain unchanged 
B) decrease; remain unchanged 
C) increase; decrease 
D) decrease; increase 
E) increase; increase 
A) increase; remain unchanged 
B) decrease; remain unchanged 
C) increase; decrease 
D) decrease; increase 
E) increase; increase

Question 10

The brassinosteroid receptor differs from the receptors for auxin, gibberellin, ethylene and cytokinins in that the brassinosteroid receptor:

Accepted Answer

A) is located entirely in the endoplasmic reticulum. 
B) has an extracellular region, a transmembrane region, and a cytoplasmic region. 
C) is located entirely in the cytoplasm. 
D) does not initiate a signaling cascade. 
E) binds directly with genes in the nucleus. 
A) is located entirely in the endoplasmic reticulum. 
B) has an extracellular region, a transmembrane region, and a cytoplasmic region. 
C) is located entirely in the cytoplasm. 
D) does not initiate a signaling cascade. 
E) binds directly with genes in the nucleus.

Question 11

Cell wall extensibility, and thus cell expansion, is increased by ______ but decreased by ______.

Accepted Answer

A) auxin and ethylene; GA and ABA 
B) auxin and GA; ABA and ethylene 
C) auxin and ABA; GA and ethylene 
D) ABA and ethylene; auxin and GA 
E) ABA and GA; auxin and ethylene 
A) auxin and ethylene; GA and ABA 
B) auxin and GA; ABA and ethylene 
C) auxin and ABA; GA and ethylene 
D) ABA and ethylene; auxin and GA 
E) ABA and GA; auxin and ethylene

Question 12

Cytokinins are synthesized in ____ and transported from there to all other parts of the plant.

Accepted Answer

A) stems 
B) shoot apical meristems 
C) leaves 
D) roots 
E) fruits 
A) stems 
B) shoot apical meristems 
C) leaves 
D) roots 
E) fruits

Question 13

If wounding causes the destruction of vascular tissues in an herbaceous eudicot stem:

Accepted Answer

A) replacement vascular tissues will not form under any conditions. 
B) replacement vascular tissues will form if IAA is added to the stem just below the wound. 
C) replacement vascular tissues will form if the leaves and buds above the wound are intact. 
D) water will be transported in pith cells instead of in xylem. 
E) food will be transported in pith cells instead of in phloem. 
A) replacement vascular tissues will not form under any conditions. 
B) replacement vascular tissues will form if IAA is added to the stem just below the wound. 
C) replacement vascular tissues will form if the leaves and buds above the wound are intact. 
D) water will be transported in pith cells instead of in xylem. 
E) food will be transported in pith cells instead of in phloem.

Question 14

If cell wall microfibrils are oriented transversely, the cell normally expands:

Accepted Answer

A) in all directions. 
B) at an oblique angle. 
C) first laterally and then longitudinally. 
D) laterally. 
E) longitudinally. 
A) in all directions. 
B) at an oblique angle. 
C) first laterally and then longitudinally. 
D) laterally. 
E) longitudinally.

Question 15

In climacteric fruits, there is a large increase in cellular respiration during ripening.

Accepted Answer

A) True 
 B)False

Question 16

Application of cytokinin inhibits the growth of lateral buds.

Accepted Answer

A) True 
 B)False

Question 17

If a coleoptile tip is covered with a blackened glass tube then illuminated from the side, the coleoptile will:

Accepted Answer

A) die. 
B) not bend. 
C) bend toward the light. 
D) bend away from the light. 
E) bend at right angles to the light. 
A) die. 
B) not bend. 
C) bend toward the light. 
D) bend away from the light. 
E) bend at right angles to the light.

Question 18

Jasmonic acid has a structure similar to aspirin.

Accepted Answer

A) True 
 B)False

Question 19

The climacteric is the phase in which fruits undergo a(n):

Accepted Answer

A) decrease in photosynthesis. 
B) decrease in respiration. 
C) increase in photosynthesis. 
D) increase in respiration. 
E) increase in pectin synthesis. 
A) decrease in photosynthesis. 
B) decrease in respiration. 
C) increase in photosynthesis. 
D) increase in respiration. 
E) increase in pectin synthesis.

Question 20

The weed killer 2,4-D is a synthetic cytokinin.

Accepted Answer

A) True 
 B)False

Exam 27: Regulating Growth and Development: the Plant Hormones

When tobacco pith callus is treated with higher concentrations of auxin than kinetin, ______ is(are) formed.

In Arabidopsis, the ethylene receptor is located in the:

_________ have recently been ranked along with the "classic five" as a major class of plant hormone.

In etiolated pea seedlings, ethylene causes ______ longitudinal growth, ______ radial expansion of epicotyls, and ______ growth of epicotyls.

In the acid-growth hypothesis of cell wall extensibility, which of the following events occurs FIRST?

The transport of auxin can be nonpolar as well as polar.

An excised leaf floated in a kinetin solution will remain green longer than a leaf floated in water.

Which of the following is a phenolic compound with a structure similar to aspirin?

In isolated barley aleurone cells, treatment with GA causes the levels of α-amylase to ______, and treatment with ABA causes the levels to ______.

The brassinosteroid receptor differs from the receptors for auxin, gibberellin, ethylene and cytokinins in that the brassinosteroid receptor:

Cell wall extensibility, and thus cell expansion, is increased by ______ but decreased by ______.

Cytokinins are synthesized in ____ and transported from there to all other parts of the plant.

If wounding causes the destruction of vascular tissues in an herbaceous eudicot stem:

If cell wall microfibrils are oriented transversely, the cell normally expands:

In climacteric fruits, there is a large increase in cellular respiration during ripening.

Application of cytokinin inhibits the growth of lateral buds.

If a coleoptile tip is covered with a blackened glass tube then illuminated from the side, the coleoptile will:

Jasmonic acid has a structure similar to aspirin.

The climacteric is the phase in which fruits undergo a(n):

The weed killer 2,4-D is a synthetic cytokinin.

Botany: an Introduction

The Molecular Composition of Plant Cells

The Plant Cell and the Cell Cycle

The Movement of Substances Into and Out of Cells

The Flow of Energy

Respiration

Photosynthesis, Light, and Life

Sexual Reproduction and Heredity

The Chemistry of Heredity and Gene Expression

Recombinant Dna Technology, Plant Biotechnology, and Genomics

The Process of Evolution

Systematics: the Science of Biological Diversity

Prokaryotes and Viruses

Fungi

Protists: Algae and Heterotrophic Protists

Bryophytes

Seedless Vascular Plants

Gymnosperms

Introduction to the Angiosperms

Evolution of the Angiosperms

Plants and People

Early Development of the Plant Body

Cells and Tissues of the Plant Body

The Root: Structure and Development

The Shoot: Primary Structure and Development

Secondary Growth in Stems

External Factors and Plant Growth

Plant Nutrition and Soils

The Movement of Water and Solutes in Plants

The Dynamics of Communities and Ecosystems

Global Ecology

Filters

In etiolated pea seedlings, ethylene causes longitudinal growth, radial expansion of epicotyls, and __ growth of epicotyls.

In isolated barley aleurone cells, treatment with GA causes the levels of α-amylase to , and treatment with ABA causes the levels to .

Cell wall extensibility, and thus cell expansion, is increased by but decreased by .