Question 1

Consider a living plant cell in a living leaf that is not wilted. The pressure potential (ψP) of such a cell ____ that in the fluids surrounding the cell.

Accepted Answer

A)  is typically lower than 
B)  varies widely from higher to lower than 
C)  is typically higher than 
D)  is typically about the same as 
E)  is typically less negative than 
A)  is typically lower than 
B)  varies widely from higher to lower than 
C)  is typically higher than 
D)  is typically about the same as 
E)  is typically less negative than

Question 2

The movement of phloem sap is best described from the ____ to the ____.

Accepted Answer

A)  shoot system; root system 
B)  sinks; sources 
C)  root system; shoot system 
D)  sources; sinks 
E)  shoot system; sinks 
A)  shoot system; root system 
B)  sinks; sources 
C)  root system; shoot system 
D)  sources; sinks 
E)  shoot system; sinks

Question 3

At a source, the phloem typically has a water potential that is ____ that in surrounding xylem.

Accepted Answer

A)  lower than 
B)  about the same as 
C)  higher than 
D)  exactly the same as 
E)  less negative than 
A)  lower than 
B)  about the same as 
C)  higher than 
D)  exactly the same as 
E)  less negative than

Question 4

A plant cell with a ψP = 0.2 MPa maintains a constant volume when bathed in a solution that has a ψS = -0.2 MPa and is in an open container. What do you know about the cell?

Accepted Answer

A)  The cell has a ψS = 0.4 MPa. 
B)  The cell has a ψS = -0.2 MPa. 
C)  The cell has a ψS = -0.4 MPa. 
D)  The cell has aψ = -0.4 MPa. 
E)  The cell has aψ = 0.2 MPa 
A)  The cell has a ψS = 0.4 MPa. 
B)  The cell has a ψS = -0.2 MPa. 
C)  The cell has a ψS = -0.4 MPa. 
D)  The cell has aψ = -0.4 MPa. 
E)  The cell has aψ = 0.2 MPa

Question 5

If a living plant cell is placed in a beaker with a solution that has a ψ value lower than the ψ value of the plant cell, the plant cell will ____.

Accepted Answer

A)  take up water until it bursts 
B)  lose water until its ψ = ψ of the solution 
C)  take up water until within the cell ψP = -ψS 
D)  take up water until its ψ = ψS of the solution 
E)  lose water until its ψS = its ψP 
A)  take up water until it bursts 
B)  lose water until its ψ = ψ of the solution 
C)  take up water until within the cell ψP = -ψS 
D)  take up water until its ψ = ψS of the solution 
E)  lose water until its ψS = its ψP

Question 6

If a living plant cell is placed in a beaker with pure water, it will take up water until ____.

Accepted Answer

A)  within the cell ψP = -ψS 
B)  it bursts 
C)  its ψP = 0 
D)  its ψS = ψS of the pure water 
E)  its ψS = 0 
A)  within the cell ψP = -ψS 
B)  it bursts 
C)  its ψP = 0 
D)  its ψS = ψS of the pure water 
E)  its ψS = 0

Question 7

"Honeydew" is essentially ____.

Accepted Answer

A)  xylem sap forced out of the margins of leaves 
B)  xylem sap harvested by honeybees 
C)  phloem sap harvested as syrup 
D)  xylem sap separated from syrup 
E)  phloem sap leaving the anus of an aphid 
A)  xylem sap forced out of the margins of leaves 
B)  xylem sap harvested by honeybees 
C)  phloem sap harvested as syrup 
D)  xylem sap separated from syrup 
E)  phloem sap leaving the anus of an aphid

Question 8

Aquaporins are ____.

Accepted Answer

A)  channel proteins for water 
B)  carrier proteins for solutes 
C)  channel proteins for solutes 
D)  carrier proteins for water 
E)  carrier proteins for water and solutes 
A)  channel proteins for water 
B)  carrier proteins for solutes 
C)  channel proteins for solutes 
D)  carrier proteins for water 
E)  carrier proteins for water and solutes

Question 9

Generally, the energy for pumping protons outside of a plant cell comes most directly from ____.

Accepted Answer

A)  sunlight 
B)  starch 
C)  ATP 
D)  diffusion 
E)  glucose 
A)  sunlight 
B)  starch 
C)  ATP 
D)  diffusion 
E)  glucose

Question 10

In phloem movement, ____ cannot serve as a sink.

Accepted Answer

A)  young leaves 
B)  young roots 
C)  developing fruits 
D)  tulip bulbs after the plant has bloomed 
E)  soil 
A)  young leaves 
B)  young roots 
C)  developing fruits 
D)  tulip bulbs after the plant has bloomed 
E)  soil

Question 11

Phloem does not transport ____.

Accepted Answer

A)  carbohydrates 
B)  hormones 
C)  amino acids 
D)  fatty acids 
E)  nitrate 
A)  carbohydrates 
B)  hormones 
C)  amino acids 
D)  fatty acids 
E)  nitrate

Question 12

Which factor has little effect on the rate of transpiration?

Accepted Answer

A)  air temperature 
B)  relative humidity 
C)  air movement 
D)  the amount of direct solar radiation 
E)  daily fluctuations in atmospheric carbon dioxide concentrations 
A)  air temperature 
B)  relative humidity 
C)  air movement 
D)  the amount of direct solar radiation 
E)  daily fluctuations in atmospheric carbon dioxide concentrations

Question 13

Metabolomics is based on the premise that ____.

Accepted Answer

A)  plant mitochondria are unique to harnessing ATP to develop alternative energy sources 
B)  plant chloroplasts are unique to harnessing light for energy 
C)  harnessing the 200,000 to 1 million different chemicals produced by plant metabolism for human needs is increasingly important 
D)  plant metabolism is difficult to manipulate 
E)  plant metabolism is simple to manipulate 
A)  plant mitochondria are unique to harnessing ATP to develop alternative energy sources 
B)  plant chloroplasts are unique to harnessing light for energy 
C)  harnessing the 200,000 to 1 million different chemicals produced by plant metabolism for human needs is increasingly important 
D)  plant metabolism is difficult to manipulate 
E)  plant metabolism is simple to manipulate

Question 14

The most widely accepted and supported model that explains the movement of xylem sap is the ____ mechanism.

Accepted Answer

A)  cohesion-tension 
B)  translocation 
C)  pressure flow 
D)  osmosis 
E)  transpiration 
A)  cohesion-tension 
B)  translocation 
C)  pressure flow 
D)  osmosis 
E)  transpiration

Exam 34: Transport in Plants

Consider a living plant cell in a living leaf that is not wilted. The pressure potential (ψP) of such a cell ____ that in the fluids surrounding the cell.

The movement of phloem sap is best described from the ____ to the ____.

At a source, the phloem typically has a water potential that is ____ that in surrounding xylem.

A plant cell with a ψP = 0.2 MPa maintains a constant volume when bathed in a solution that has a ψS = -0.2 MPa and is in an open container. What do you know about the cell?

If a living plant cell is placed in a beaker with a solution that has a ψ value lower than the ψ value of the plant cell, the plant cell will ____.

If a living plant cell is placed in a beaker with pure water, it will take up water until ____.

"Honeydew" is essentially ____.

Aquaporins are ____.

Generally, the energy for pumping protons outside of a plant cell comes most directly from ____.

In phloem movement, ____ cannot serve as a sink.

Phloem does not transport ____.

Which factor has little effect on the rate of transpiration?

Metabolomics is based on the premise that ____.

The most widely accepted and supported model that explains the movement of xylem sap is the ____ mechanism.

Introduction to Biological Concepts and Research

Life, Chemistry, and Water

Biological Molecules: the Carbon Compounds of Life

Cells

Membranes and Transport

Energy, Enzymes, and Biological Reactions

Cellular Respiration: Harvesting Chemical Energy

Photosynthesis

Cell Communication

Cell Division and Mitosis

Meiosis: the Cellular Basis of Sexual Reproduction

Mendel, Genes, and Inheritance

Genes, Chromosomes, and Human Genetics

Dna Structure, Replication, and Organization

Gene Expression: From Dna to Protein

Regulation of Gene Expression

Bacterial and Viral Genetics

Dna Technology: Making and Using Genetically Altered Organisms, and Other Applications

Genomes and Proteomes

The Development of Evolutionary Thought

Microevolution: Genetic Changes Within Populations

Speciation

Paleobiology and Macroevolution

Systematic Biology: Phylogeny and Classification

The Origin of Life

Prokaryotes and Viruses

Protists

Seedless Plants

Seed Plants

Fungi

Animal Phylogeny, Acoelomates, and Protostomes

Deuterostomes: Vertebrates and Their Closest Relatives

The Plant Body

Plant Nutrition

Reproduction and Development in Flowering Plants

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Information Flow and the Neuron

Nervous Systems

Sensory Systems

The Endocrine System

Muscles, Bones, and Body Movements

The Circulatory System

Defenses Against Disease

Gas Exchange: the Respiratory System

Digestive Systems and Animal Nutrition

Regulating the Internal Environment: Osmoregulation, Excretion, and Thermoregulation

Animal Reproduction

Animal Development

Ecology and the Biosphere

Population Ecology

Population Interactions and Community Ecology

Ecosystems

Biodiversity and Conservation Biology

Animal Behavior

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