Question 1

Which of the following requires adenosine triphosphate?

Accepted Answer

A)  Facilitated diffusion 
B)  Simple diffusion 
C)  Active transport 
D)  Osmosis 
A)  Facilitated diffusion 
B)  Simple diffusion 
C)  Active transport 
D)  Osmosis

Question 2

If you forget to water your favorite plant, all of the following will occur at a cellular level EXCEPT

Accepted Answer

A)  turgor pressure will build up in the cell. 
B)  osmosis will occur. 
C)  the plasma membrane will shrink away from the cell wall. 
D)  water will move out of the vacuoles by osmosis. 
E)  water will move out of the cytosol by osmosis. 
A)  turgor pressure will build up in the cell. 
B)  osmosis will occur. 
C)  the plasma membrane will shrink away from the cell wall. 
D)  water will move out of the vacuoles by osmosis. 
E)  water will move out of the cytosol by osmosis.

Question 3

The cells of the bladder are joined to one another by that prevent substances from passing between the cells of this tissue.

Accepted Answer

The answer of The cells of the bladder are joined...

Question 4

When very small viruses infect a plant cell by crossing its membrane, the viruses often spread rapidly throughout the entire plant without crossing additional membranes. Explain how this occurs.

Accepted Answer

The viruses travel c

Question 5

Which of the following groups includes carrier and channel proteins?

Accepted Answer

A)  Recognition proteins 
B)  Transport proteins 
C)  Connection proteins 
D)  Receptor proteins 
A)  Recognition proteins 
B)  Transport proteins 
C)  Connection proteins 
D)  Receptor proteins

Question 6

Cystic fibrosis is a genetic disease that leads to the production of excessive, thick mucus in the respiratory tract, causing frequent and serious respiratory infections. The defect is due to the production of a faulty membrane protein for the transport of the chloride ion. The protein exists in membranes, but it doesn't function normally. Based on this scenario, what is occurring at the molecular level in a person with cystic fibrosis?

Accepted Answer

A)  A recognition protein is being adversely affected. 
B)  A carrier protein is being adversely affected. 
C)  A receptor protein is being adversely affected. 
D)  Protein filaments in the cytoplasm are being adversely affected. 
E)  A channel protein is being adversely affected. 
A)  A recognition protein is being adversely affected. 
B)  A carrier protein is being adversely affected. 
C)  A receptor protein is being adversely affected. 
D)  Protein filaments in the cytoplasm are being adversely affected. 
E)  A channel protein is being adversely affected.

Question 7

Why is the biological membrane said to be selectively permeable?

Accepted Answer

It allows only some

Question 8

Adhesion of cells within animal tissues is accomplished by cell- to- cell junctions called

Accepted Answer

A)  desmosomes. 
B)  tight junctions. 
C)  gap junctions. 
D)  plasmodesmata. 
A)  desmosomes. 
B)  tight junctions. 
C)  gap junctions. 
D)  plasmodesmata.

Question 9

Solutions that cause water to enter cells by osmosis are called

Accepted Answer

A)  permeable. 
B)  hypertonic. 
C)  hypotonic. 
D)  isotonic. 
E)  hydrophilic. 
A)  permeable. 
B)  hypertonic. 
C)  hypotonic. 
D)  isotonic. 
E)  hydrophilic.

Question 10

Plasma membranes are best described as a

Accepted Answer

A)  single layer of phospholipids with tails pointed toward the inside of the cell. 
B)  double layer of phospholipids with hydrophilic heads facing away from one another. 
C)  single layer of phospholipids with water molecules attached along one side. 
D)  double layer of phospholipids with hydrophobic tails facing toward one another. 
E)  double layer of phospholipids with hydrophobic tails facing away from each other (toward the cytoplasm of the cell and the extracellular solution). 
A)  single layer of phospholipids with tails pointed toward the inside of the cell. 
B)  double layer of phospholipids with hydrophilic heads facing away from one another. 
C)  single layer of phospholipids with water molecules attached along one side. 
D)  double layer of phospholipids with hydrophobic tails facing toward one another. 
E)  double layer of phospholipids with hydrophobic tails facing away from each other (toward the cytoplasm of the cell and the extracellular solution).

Question 11

Suppose you have two glucose solutions separated by a selectively permeable membrane. If there is a concentration gradient of glucose across the membrane, then the solutions cannot be relative to each other.

Accepted Answer

A)  isotonic 
B)  hypertonic 
C)  hypotonic 
A)  isotonic 
B)  hypertonic 
C)  hypotonic

Question 12

The hydrophilic regions of a membrane protein are most likely to be found

Accepted Answer

A)  associated with the fatty acid region of the lipids. 
B)  in the interior of the membrane. 
C)  exposed on the surface of the cell membrane. 
D)  only in muscle cell membranes. 
E)  attached to carbohydrates and facing the interior of a cell. 
A)  associated with the fatty acid region of the lipids. 
B)  in the interior of the membrane. 
C)  exposed on the surface of the cell membrane. 
D)  only in muscle cell membranes. 
E)  attached to carbohydrates and facing the interior of a cell.

Question 13

The slowest rate of diffusion of dye particles in water will occur at

Accepted Answer

A)  10°C. 
B)  60°C. 
C)  20°C. 
D)  30°C. 
A)  10°C. 
B)  60°C. 
C)  20°C. 
D)  30°C.

Question 14

Molecules that permeate a plasma membrane by facilitated diffusion

Accepted Answer

A)  do so much more quickly than those crossing by simple diffusion. 
B)  require the aid of transport proteins. 
C)  require energy. 
D)  move from an area of low concentration to an area of high concentration. 
A)  do so much more quickly than those crossing by simple diffusion. 
B)  require the aid of transport proteins. 
C)  require energy. 
D)  move from an area of low concentration to an area of high concentration.

Question 15

If red blood cells are taken from the body and placed in a hypertonic solution, what happens to the cells?

Accepted Answer

A)  The cells remain unchanged due to equal solute concentrations inside and outside the cells. 
B)  The cells remain unchanged due to equal water concentrations inside and outside the cells. 
C)  They become white blood cells. 
D)  The cells swell and burst because water moves into them. 
E)  The cells shrivel up because water leaves them. 
A)  The cells remain unchanged due to equal solute concentrations inside and outside the cells. 
B)  The cells remain unchanged due to equal water concentrations inside and outside the cells. 
C)  They become white blood cells. 
D)  The cells swell and burst because water moves into them. 
E)  The cells shrivel up because water leaves them.

Question 16

The movement of molecules across a cell membrane via a transport protein in which no energy is required is called diffusion, and the movement of molecules across a cell membrane via a protein in which energy (i.e., ATP) is required is called _ transport.

Accepted Answer

The answer of The movement of molecules across a cell...

Question 17

The diffusion of water molecules across a selectively permeable membrane is called

Accepted Answer

A)  facilitated diffusion. 
B)  exocytosis. 
C)  active transport. 
D)  osmosis. 
E)  hydrolysis. 
A)  facilitated diffusion. 
B)  exocytosis. 
C)  active transport. 
D)  osmosis. 
E)  hydrolysis.

Question 18

Cell membranes do all of the following EXCEPT

Accepted Answer

A)  isolate the cell's contents from the external environment. 
B)  provide attachments between cells. 
C)  regulate the movement of substances between the cytoplasm of the cell and the extracellular fluid. 
D)  allow communication between cells. 
E)  provide an energy source for the cell. 
A)  isolate the cell's contents from the external environment. 
B)  provide attachments between cells. 
C)  regulate the movement of substances between the cytoplasm of the cell and the extracellular fluid. 
D)  allow communication between cells. 
E)  provide an energy source for the cell.

Question 19

The main lipids found in cell membranes are

Accepted Answer

A)  waxes. 
B)  phospholipids. 
C)  steroids. 
D)  triglycerides. 
E)  glycerol. 
A)  waxes. 
B)  phospholipids. 
C)  steroids. 
D)  triglycerides. 
E)  glycerol.

Question 20

Cells use exocytosis to

Accepted Answer

A)  ingest nutrients. 
B)  pump hydrogen molecules across the membrane. 
C)  create new cells. 
D)  release substances from the cell. 
E)  move away from danger. 
A)  ingest nutrients. 
B)  pump hydrogen molecules across the membrane. 
C)  create new cells. 
D)  release substances from the cell. 
E)  move away from danger.

Exam 5: Cell Membrane Structure and Function

Which of the following requires adenosine triphosphate?

If you forget to water your favorite plant, all of the following will occur at a cellular level EXCEPT

The cells of the bladder are joined to one another by that prevent substances from passing between the cells of this tissue.

When very small viruses infect a plant cell by crossing its membrane, the viruses often spread rapidly throughout the entire plant without crossing additional membranes. Explain how this occurs.

Which of the following groups includes carrier and channel proteins?

Why is the biological membrane said to be selectively permeable?

Adhesion of cells within animal tissues is accomplished by cell- to- cell junctions called

Solutions that cause water to enter cells by osmosis are called

Plasma membranes are best described as a

Suppose you have two glucose solutions separated by a selectively permeable membrane. If there is a concentration gradient of glucose across the membrane, then the solutions cannot be relative to each other.

The hydrophilic regions of a membrane protein are most likely to be found

The slowest rate of diffusion of dye particles in water will occur at

Molecules that permeate a plasma membrane by facilitated diffusion

If red blood cells are taken from the body and placed in a hypertonic solution, what happens to the cells?

The movement of molecules across a cell membrane via a transport protein in which no energy is required is called diffusion, and the movement of molecules across a cell membrane via a protein in which energy (i.e., ATP) is required is called _ transport.

The diffusion of water molecules across a selectively permeable membrane is called

Cell membranes do all of the following EXCEPT

The main lipids found in cell membranes are

Cells use exocytosis to

An Introduction to Life on Earth

Atoms, Molecules, and Life

Biological Molecules

Cell Structure and Function

Energy Flow in the Life of a Cell

Capturing Solar Energy: Photosynthesis

Harvesting Energy: Glycolysis and Cellular Respiration

Cellular Reproduction

Meiosis: the Basis of Sexual Reproduction

Patterns of Inheritance

Dna: the Molecule of Heredity

Gene Expression and Regulation

Biotechnology

Principles of Evolution

How Populations Evolve

The Origin of Species

The History of Life

Systematics: Seeking Order Amid Diversity

The Diversity of Prokaryotes and Viruses

The Diversity of Protists

The Diversity of Plants

The Diversity of Fungi

Animal Diversity I: Invertebrates

Animal Diversity II: Vertebrates

Animal Behavior

Population Growth and Regulation

Community Interactions

Energy Flow and Nutrient Cycling in Ecosystems

Earths Diverse Ecosystems

Conserving Earths Biodiversity

Homeostasis and the Organization of the Animal Body

Circulation

Respiration

Nutrition and Digestion

The Urinary System

Defenses Against Disease

Chemical Control of the Animal Body: the Endocrine System

The Nervous System

The Senses

Action and Support: the Muscles and Skeleton

Animal Reproduction

Animal Development

Plant Anatomy and Nutrient Transport

Plant Reproduction and Development

Plant Responses to the Environment

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