Question 1

What is the role of transport proteins within the plasma membrane?

Accepted Answer

A) Transport proteins prevent the passage of amino acids through the membrane. 
B) Transport proteins allow movement of ions and polar molecules through the plasma membrane. 
C) Transport proteins identify the cell. 
D) Transport proteins interact with the cytoskeleton to stabilize various parts of the cell. 
E) Transport proteins maintain membrane fluidity. 
A) Transport proteins prevent the passage of amino acids through the membrane. 
B) Transport proteins allow movement of ions and polar molecules through the plasma membrane. 
C) Transport proteins identify the cell. 
D) Transport proteins interact with the cytoskeleton to stabilize various parts of the cell. 
E) Transport proteins maintain membrane fluidity.

Question 2

The glycocalyx is found just inside the plasma membrane of the cell.

Accepted Answer

A) True 
 B)False

Question 3

A ________ plasma membrane allows water but not solutes to pass through it.

Accepted Answer

The answer of A ________ plasma membrane allows water but...

Question 4

Diffusing molecules move ________ until they are ________.

Accepted Answer

A) down their concentration gradients; evenly distributed 
B) up their concentration gradients; evenly distributed 
C) through channels of active transport proteins; evenly distributed 
D) up their concentration gradients; unevenly distributed 
E) down their concentration gradients; unevenly distributed 
A) down their concentration gradients; evenly distributed 
B) up their concentration gradients; evenly distributed 
C) through channels of active transport proteins; evenly distributed 
D) up their concentration gradients; unevenly distributed 
E) down their concentration gradients; unevenly distributed

Question 5

The primary component of the plasma membrane is:

Accepted Answer

A) cholesterol. 
B) phospholipid. 
C) protein. 
D) carbohydrate. 
A) cholesterol. 
B) phospholipid. 
C) protein. 
D) carbohydrate.

Question 6

Water moves from a:

Accepted Answer

A) hypotonic environment to a hypertonic environment. 
B) hypertonic environment to a hypotonic environment. 
C) low free-water solution toward a high free-water solution. 
D) solution with more salt to a solution with less salt. 
A) hypotonic environment to a hypertonic environment. 
B) hypertonic environment to a hypotonic environment. 
C) low free-water solution toward a high free-water solution. 
D) solution with more salt to a solution with less salt.

Question 7

A cell wall stops a plant cell from taking in so much water that it will burst.

Accepted Answer

A) True 
 B)False

Question 8

Active transport moves a substance against the concentration gradient.

Accepted Answer

A) True 
 B)False

Exam 5: Lifes Border: the Plasma Membrane

What is the role of transport proteins within the plasma membrane?

The glycocalyx is found just inside the plasma membrane of the cell.

A ________ plasma membrane allows water but not solutes to pass through it.

Diffusing molecules move ________ until they are ________.

The primary component of the plasma membrane is:

Water moves from a:

A cell wall stops a plant cell from taking in so much water that it will burst.

Active transport moves a substance against the concentration gradient.

Science As a Way of Learning: a Guide to the Natural World

Fundamental Building Blocks: Chemistry, water, and Ph

Lifes Components: Biological Molecules

Lifes Home: the Cell

Lifes Mainspring: an Introduction to Energy

Vital Harvest: Deriving Energy From Food

The Green Worlds Gift: Photosynthesis

The Links in Lifes Chain: Genetics and Cell Division

Preparing for Sexual Reproduction: Meiosis

The First Geneticist: Mendel and His Discoveries

Units of Heredity: Chromosomes and Inheritance

Passing on Lifes Information: Dna Structure and Replication

How Proteins Are Made: Genetic Transcription, translation, and Regulation

The Future Isnt What It Used to Be: Biotechnology

An Introduction to Evolution: Charles Darwin, evolutionary Thought, and the Evidence for Evolution

The Means of Evolution: Microevolution

The Outcomes of Evolution: Macroevolution

A Slow Unfolding: the History of Life on Earth

Arriving Late,traveling Far: the Evolution of Human Beings

Viruses,bacteria,archaea,and Protists: the Diversity of Life 1

Fungi: the Diversity of Life 2

Animals: the Diversity of Life 3

Plants: the Diversity of Life 4

The Angiosperms: Form and Function in Flowering Plants

Body Support and Movement: the Integumentary, skeletal, and Muscular Systems

Communication and Control 1: the Nervous System

Communication and Control 2: the Endocrine System

Defending the Body: the Immune System

Transport and Exchange 1: Blood and Breath

Transport and Exchange 2: Digestion, nutrition, and Elimination

An Amazingly Detailed Script: Animal Development

How the Baby Came to Be: Human Reproduction

An Interactive Living World 1: Populations in Ecology

An Interactive Living World 2: Communities in Ecology

An Interactive Living World 3: Ecosystems and Biomes

Filters

Diffusing molecules move until they are .