Question 1

Which of the following proteins is not necessarily associated with the plasma membrane?

Accepted Answer

A) recognition protein 
B) plasma protein 
C) receptor protein 
D) channel transport protein 
E) adhesion protein 
A) recognition protein 
B) plasma protein 
C) receptor protein 
D) channel transport protein 
E) adhesion protein B

Question 2

Oxygen, carbon dioxide, and other small nonpolar molecules cross the plasma membrane through the process(es) of

Accepted Answer

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

Question 3

A membrane is more "fluid" than solid because

Accepted Answer

A) phospholipid tails prevent close packing. 
B) proteins can shift positions. 
C) water is the main component. 
D) phospholipid tails prevent close packing, and proteins can shift positions. 
E) phospholipid tails prevent close packing, proteins can shift positions, and water is the main component. 
A) phospholipid tails prevent close packing. 
B) proteins can shift positions. 
C) water is the main component. 
D) phospholipid tails prevent close packing, and proteins can shift positions. 
E) phospholipid tails prevent close packing, proteins can shift positions, and water is the main component. D

Question 4

The action of a white blood cell engulfing a bacterium is

Accepted Answer

A) pinocytosis. 
B) phagocytosis. 
C) exocytosis. 
D) endocytosis. 
E) phagocytosis and endocytosis. 
A) pinocytosis. 
B) phagocytosis. 
C) exocytosis. 
D) endocytosis. 
E) phagocytosis and endocytosis.

Question 5

Active transport

Accepted Answer

A) works against concentration gradients. 
B) works with concentration gradients.   
C) requires ATP-driven protein motors. 
D) requires channel proteins to change shape. 
E) does none of these. 
A) works against concentration gradients. 
B) works with concentration gradients.   
C) requires ATP-driven protein motors. 
D) requires channel proteins to change shape. 
E) does none of these.

Question 6

A concentration gradient ceases to exist when

Accepted Answer

A) all the molecules have moved from high concentration to low. 
B) the membrane pores close. 
C) the temperature drops. 
D) there is no net movement. 
E) bulk flow intervenes. 
A) all the molecules have moved from high concentration to low. 
B) the membrane pores close. 
C) the temperature drops. 
D) there is no net movement. 
E) bulk flow intervenes.

Question 7

The method of movement that requires the expenditure of ATP molecules is

Accepted Answer

A) simple diffusion. 
B) facilitated diffusion. 
C) osmosis. 
D) active transport. 
E) bulk flow. 
A) simple diffusion. 
B) facilitated diffusion. 
C) osmosis. 
D) active transport. 
E) bulk flow.

Question 8

A red blood cell will burst when placed in which of the following kinds of solution?

Accepted Answer

A) hypotonic 
B) hypertonic 
C) isotonic 
D) any of these 
E) none of these 
A) hypotonic 
B) hypertonic 
C) isotonic 
D) any of these 
E) none of these

Question 9

The above figure represents which of the following?

Accepted Answer

A) simple diffusion 
B) bulk flow 
C) osmosis 
D) phagocytosis 
E) endocytosis 
A) simple diffusion 
B) bulk flow 
C) osmosis 
D) phagocytosis 
E) endocytosis

Question 10

Most of the functions of plasma membranes are carried out by

Accepted Answer

A) cholesterol. 
B) proteins. 
C) hydrophilic heads. 
D) hydrophobic tails. 
E) carbohydrates. 
A) cholesterol. 
B) proteins. 
C) hydrophilic heads. 
D) hydrophobic tails. 
E) carbohydrates.

Question 11

Which statement is NOT true?

Accepted Answer

A) Membranes are often perforated by proteins that extend through both sides of the membrane. 
B) Some membranes have proteins with channels that allow for the passage of hydrophilic substances. 
C) Hydrophilic substances have an easier time passing through membranes than do hydrophobic substances. 
D) The current concept of a membrane is best summarized by the fluid mosaic model. 
E) All of these. 
A) Membranes are often perforated by proteins that extend through both sides of the membrane. 
B) Some membranes have proteins with channels that allow for the passage of hydrophilic substances. 
C) Hydrophilic substances have an easier time passing through membranes than do hydrophobic substances. 
D) The current concept of a membrane is best summarized by the fluid mosaic model. 
E) All of these.

Question 12

Which of these three mechanisms illustrates facilitated diffusion?

Accepted Answer

A) A 
B) B 
C) C 
D) both A and B 
E) none of these 
A) A 
B) B 
C) C 
D) both A and B 
E) none of these

Question 13

In simple diffusion,

Accepted Answer

A) the rate of movement of molecules is influenced by temperature and pressure. 
B) the movement of individual molecules is random. 
C) the movement of molecules of one substance is independent of the movement of any other substance. 
D) the net movement is away from the region of highest concentration. 
E) all of these happen. 
A) the rate of movement of molecules is influenced by temperature and pressure. 
B) the movement of individual molecules is random. 
C) the movement of molecules of one substance is independent of the movement of any other substance. 
D) the net movement is away from the region of highest concentration. 
E) all of these happen.

Question 14

A hypothetical "microbullet" shot through a phospholipid bilayer would pass the components in which order?

Accepted Answer

A) tail >>> tail >>> head >>> head 
B) head >>> tail >>> head >>> tail 
C) tail >>> head >>> head >>> tail 
D) head >>> tail >>> tail >>> head 
E) head >>> head >>> tail >>> tail 
A) tail >>> tail >>> head >>> head 
B) head >>> tail >>> head >>> tail 
C) tail >>> head >>> head >>> tail 
D) head >>> tail >>> tail >>> head 
E) head >>> head >>> tail >>> tail

Question 15

White blood cells use __________ to get rid of foreign particles in the blood.

Accepted Answer

A) simple diffusion 
B) bulk flow 
C) osmosis 
D) phagocytosis 
E) facilitated diffusion 
A) simple diffusion 
B) bulk flow 
C) osmosis 
D) phagocytosis 
E) facilitated diffusion

Question 16

Which of the following is NOT a form of passive transport?

Accepted Answer

A) osmosis 
B) facilitated diffusion 
C) simple diffusion 
D) exocytosis 
E) none of these 
A) osmosis 
B) facilitated diffusion 
C) simple diffusion 
D) exocytosis 
E) none of these

Question 17

This illustration shows the mechanism of

Accepted Answer

A) simple diffusion.   
B) bulk flow. 
C) endocytosis. 
D) facilitated diffusion. 
E) an active transporter. 
A) simple diffusion.   
B) bulk flow. 
C) endocytosis. 
D) facilitated diffusion. 
E) an active transporter.

Question 18

Distilled water refers to water that is nearly free of

Accepted Answer

A) solutes. 
B) ions. 
C) gases. 
D) suspended solids. 
E) none of these. 
A) solutes. 
B) ions. 
C) gases. 
D) suspended solids. 
E) none of these.

Question 19

The glucose transport mechanism is an example of

Accepted Answer

A) simple diffusion. 
B) facilitated diffusion. 
C) osmosis. 
D) active transport. 
E) bulk flow. 
A) simple diffusion. 
B) facilitated diffusion. 
C) osmosis. 
D) active transport. 
E) bulk flow.

Question 20

Cholesterol

Accepted Answer

A) is not found in plant membranes. 
B) is the main steroid component of animal cell membranes. 
C) is the main animal equivalent of plant phytosterols. 
D) has a simple OH group in its hydrophilic part. 
E) has all of these attributes. 
A) is not found in plant membranes. 
B) is the main steroid component of animal cell membranes. 
C) is the main animal equivalent of plant phytosterols. 
D) has a simple OH group in its hydrophilic part. 
E) has all of these attributes.

Exam 5: A Closer Look at Cell Membranes

Which of the following proteins is not necessarily associated with the plasma membrane?

Oxygen, carbon dioxide, and other small nonpolar molecules cross the plasma membrane through the process(es) of

A membrane is more "fluid" than solid because

The action of a white blood cell engulfing a bacterium is

Active transport

A concentration gradient ceases to exist when

The method of movement that requires the expenditure of ATP molecules is

A red blood cell will burst when placed in which of the following kinds of solution?

The above figure represents which of the following?

Most of the functions of plasma membranes are carried out by

Which statement is NOT true?

Which of these three mechanisms illustrates facilitated diffusion?

In simple diffusion,

A hypothetical "microbullet" shot through a phospholipid bilayer would pass the components in which order?

White blood cells use __________ to get rid of foreign particles in the blood.

Which of the following is NOT a form of passive transport?

This illustration shows the mechanism of

Distilled water refers to water that is nearly free of

The glucose transport mechanism is an example of

Cholesterol

Invitation to Biology

Lifes Chemical Basis

Molecules of Life

Cell Structure and Function

Ground Rules of Metabolism

Where It Startsphotosynthesis

Energy-Releasing Pathways

How Cells Reproduce

Meiosis and Sexual Reproduction

Observing Patterns in Inherited Traits

Chromosomes and Human Inheritance

Dna Structure and Function

From Dna to Protein

Controls Over Genes

Recombinant Dna and Genetic Engineering

The Macroevolutionary Puzzle

Emergence of Evolutionary Thought

Organizing Information About Species

The Origin and Evolution of Life

Viruses and Prokaryotes

Protists the Simplest Eukaryotes

Plants

Fungi

Animals: the Invertebrates

Animal Evolution the Chordates

Human Evolution: a Case Study

Plant Tissues

Plant Nutrition and Transport

Plant Reproduction

Plant Growth and Development

Animal Tissues and Organ Systems

Neural Control

Sensory Perception

Endocrine Control

Protection, Support, and Movement

Circulation

Immunity

Respiration

Digestion and Human Nutrition

Maintaining the Internal Environment

Animal Reproductive Systems

Animal Development

Animal Behavior

Population Ecology

Community Structure and Biodiversity

Ecosystems

The Biosphere

Human Impacts on the Biosphere

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