Question 1

Which class of proteins is embedded in the phospholipid bilayer?

Accepted Answer

A)  cytoskeletal proteins 
B)  integral membrane proteins 
C)  transcription factor proteins 
D)  peripheral membrane proteins 
E)  protein hormones 
A)  cytoskeletal proteins 
B)  integral membrane proteins 
C)  transcription factor proteins 
D)  peripheral membrane proteins 
E)  protein hormones

Question 2

Organisms must constantly bring in certain molecules and ions while keeping others out. This function is accomplished by ____.

Accepted Answer

A)  the nucleus 
B)  lysosomes 
C)  vesicles 
D)  the plasma membrane 
E)  the Golgi complex 
A)  the nucleus 
B)  lysosomes 
C)  vesicles 
D)  the plasma membrane 
E)  the Golgi complex

Question 3

A(n) ____ environment is ideal for plant cells, while a(n) ____ environment is best for animal cells.

Accepted Answer

A)  isotonic; hypotonic 
B)  hypotonic; isotonic 
C)  hypotonic; hypertonic 
D)  hypertonic; isotonic 
E)  isotonic; isotonic 
A)  isotonic; hypotonic 
B)  hypotonic; isotonic 
C)  hypotonic; hypertonic 
D)  hypertonic; isotonic 
E)  isotonic; isotonic

Question 4

A(n) ____ gradient is created as ions diffuse across membranes.

Accepted Answer

A)  chemical 
B)  electrochemical 
C)  negative 
D)  electrical 
E)  active 
A)  chemical 
B)  electrochemical 
C)  negative 
D)  electrical 
E)  active

Question 5

As a result of calcium pumps, calcium concentrations are typically higher outside cells than in the cytosol.

Accepted Answer

A) True 
 B)False

Question 6

For osmosis to occur, ____.

Accepted Answer

A)  a selectively permeable membrane must be present 
B)  a concentration gradient cannot exist 
C)  cellular energy must be expended 
D)  pure water must be on one side of the membrane 
E)  only solutes can pass through the membrane 
A)  a selectively permeable membrane must be present 
B)  a concentration gradient cannot exist 
C)  cellular energy must be expended 
D)  pure water must be on one side of the membrane 
E)  only solutes can pass through the membrane

Question 7

An isotonic solution has a solute concentration ____ the solute concentration inside the cell.

Accepted Answer

A)  equal to 
B)  greater than 
C)  less than 
D)  that depends on 
E)  that alters 
A)  equal to 
B)  greater than 
C)  less than 
D)  that depends on 
E)  that alters

Question 8

Water is a strongly polar molecule. How does it cross the plasma membrane?

Accepted Answer

Water molecules are small enough to slip

Exam 5: Membranes and Transport

Which class of proteins is embedded in the phospholipid bilayer?

Organisms must constantly bring in certain molecules and ions while keeping others out. This function is accomplished by ____.

A(n) ____ environment is ideal for plant cells, while a(n) ____ environment is best for animal cells.

A(n) ____ gradient is created as ions diffuse across membranes.

As a result of calcium pumps, calcium concentrations are typically higher outside cells than in the cytosol.

For osmosis to occur, ____.

An isotonic solution has a solute concentration ____ the solute concentration inside the cell.

Water is a strongly polar molecule. How does it cross the plasma membrane?

Introduction to Biological Concepts and Research

Life, Chemistry, and Water

Biological Molecules: the Carbon Compounds of Life

Cells

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

Transport in Plants

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

Filters

A(n) environment is ideal for plant cells, while a(n) environment is best for animal cells.