Question 1

The coupled transport system by which glucose and sodium ions simultaneously enter intestinal epithelial cells is called _______.

Accepted Answer

The answer of The coupled transport system by which glucose...

Question 2

The compounds in biological membranes that form a barrier to the movement of hydrophilic materials across the membrane are

Accepted Answer

A)   integral membrane proteins.
B)   carbohydrates.
C)   lipids.
D)   nucleic acids.
E)   peripheral membrane proteins.F) None of the above
G) A) and D)

Question 3

You are studying how the protein transferrin enters cells. When you examine cells that have taken up transferrin, you find it inside clathrin-coated vesicles. Therefore, the most likely mechanism for uptake of transferrin is

Accepted Answer

A)   facilitated diffusion.
B)   an antiporter.
C)   receptor-mediated endocytosis.
D)   gap junctions.
E)   ion channels.F) None of the above
G) B) and D)

Question 4

The cells that make up a few animals, such as sponges, can be mechanically separated but then will re-form themselves over time. How are the separated cells able to reorganize themselves?

Accepted Answer

The cells in the sponge have the ability...

Question 5

The process of _______ involves coated pits, clathrin, and coated vesicles.

Accepted Answer

receptor-m...

Question 6

In facilitated diffusion,

Accepted Answer

A)   molecules may be transported against their concentration gradient.
B)   specific integral membrane proteins mediate transport.
C)   the rate of transport is independent of the concentration of the molecule transported.
D)   ATP is used.
E)   endocytosis is involved.F) B) and C)
G) None of the above

Question 7

Which of the following statements about the proteins of the plasma membrane and the proteins of the inner mitochondrial membrane is true?

Accepted Answer

A)   Both membranes have only peripheral proteins.
B)   Only the mitochondrial membrane has integral proteins.
C)   Only the mitochondrial membrane has peripheral proteins.
D)   All of the proteins from both membranes are hydrophilic.
E)   The two membranes differ in their lipid composition.F) B) and E)
G) A) and D)

Question 8

The sodium-potassium pump of cell membranes is an example of a coupled transport called a(n) _______.

Accepted Answer

The answer of The sodium-potassium pump of cell membranes is...

Question 9

In animals, cell recognition

Accepted Answer

A)   involves glycolipids.
B)   is mediated by the lipid bilayer.
C)   involves soluble proteins.
D)   involves proteins in plasma membranes.
E)   is usually heterotypic.F) A) and B)
G) A) and C)

Question 10

Which of the following statements regarding osmosis is false?

Accepted Answer

A)   Osmosis refers to the movement of water along a concentration gradient.
B)   In osmosis, water moves to equalize solute concentrations on either side of the membrane.
C)   The movement of water across a membrane can affect the turgor pressure of some cells.
D)   If osmosis occurs across a membrane, then diffusion is not occurring.
E)   During osmosis water is moving through membrane channels.F) D) and E)
G) B) and C)

Question 11

Use the following to answer questions :
The graph below shows the relationship between glucose concentration outside a cell and the rate of glucose diffusion across a cell membrane that has carrier proteins to facilitate diffusion. 
-Which of the following represents saturation of the carrier proteins?

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   EF) C) and E)
G) D) and E)

Question 12

When a hormone molecule binds to a specific protein on the plasma membrane, the protein it binds to is called a

Accepted Answer

A)   ligand.
B)   clathrin.
C)   receptor protein.
D)   hydrophobic protein.
E)   cell adhesion molecule.F) A) and C)
G) A) and D)

Question 13

Which of the following statements about cholesterol molecules is true?

Accepted Answer

A)   They help hold a membrane together.
B)   They transport ions across membranes.
C)   They attach to carbohydrates.
D)   They disrupt membrane function.
E)   They alter the fluidity of the membrane.F) A) and B)
G) B) and E)

Question 14

Most of the lipids composing biological membranes are called _______.

Accepted Answer

The answer of Most of the lipids composing biological membranes...

Question 15

Specialized channel proteins called connexons occur in

Accepted Answer

A)   the cytoskeleton.
B)   tight junctions.
C)   desmosomes.
D)   plasmodesmata.
E)   gap junctions.F) B) and D)
G) A) and B)

Question 16

Secondary active transport resembles transport by ion channels in that

Accepted Answer

A)   both types of transport can involve the movement of Na+ across the plasma membrane.
B)   both types of transport are indirectly linked to the hydrolysis of ATP.
C)   both can transport molecules against a concentration/electrical gradient.
D)   the same membrane proteins are used for both types of transport.
E)   both types of transport resemble facilitated diffusion.F) B) and C)
G) C) and E)

Question 17

Receptor-mediated endocytosis is the mechanism for transport of

Accepted Answer

A)   clathrin.
B)   all macromolecules.
C)   ions.
D)   cholesterol.
E)   integral membrane proteins.F) C) and D)
G) A) and B)

Question 18

Which of the following is not a function of plasma membranes?

Accepted Answer

A)   Conversion of glucose energy to ATP
B)   Arrangement of enzymes
C)   Turning off of a specific cell function
D)   Conduction of nerve impulses
E)   All of the above are functions of plasma membranes.F) A) and B)
G) C) and D)

Question 19

Learning about the formation and operation of plasma membranes may give scientists insights into a disease characterized by plaques and extreme forgetfulness called _______.

Accepted Answer

The answer of Learning about the formation and operation of...

Question 20

Facilitated diffusion

Accepted Answer

A)   is carried out by proteins that exhibit specificity for the molecules they transport.
B)   does not show saturation of the rate of transport at high concentrations of the molecule transported.
C)   is carried out by extrinsic membrane proteins.
D)   can transport a molecule against its concentration gradient.
E)   is carried out by specific membrane lipids.F) A) and B)
G) A) and C)

Exam 6: Cell Membranes

In animals, cell recognition

Correct Answer
verified

The process of _______ involves coated pits, clathrin, and coated vesicles.

Correct Answer
verified
receptor-m...
View Answer

Which of the following statements about cholesterol molecules is true?

Correct Answer
verified

Facilitated diffusion

Correct Answer
verified

Which of the following is not a function of plasma membranes?

Correct Answer
verified

You are studying how the protein transferrin enters cells. When you examine cells that have taken up transferrin, you find it inside clathrin-coated vesicles. Therefore, the most likely mechanism for uptake of transferrin is

Correct Answer
verified

The cells that make up a few animals, such as sponges, can be mechanically separated but then will re-form themselves over time. How are the separated cells able to reorganize themselves?

Correct Answer
verified
The cells in the sponge have the ability...
View Answer

Learning about the formation and operation of plasma membranes may give scientists insights into a disease characterized by plaques and extreme forgetfulness called _______.

Correct Answer
verified

When a hormone molecule binds to a specific protein on the plasma membrane, the protein it binds to is called a

Correct Answer
verified

The coupled transport system by which glucose and sodium ions simultaneously enter intestinal epithelial cells is called _______.

Correct Answer
verified

Which of the following statements about the proteins of the plasma membrane and the proteins of the inner mitochondrial membrane is true?

Correct Answer
verified

Receptor-mediated endocytosis is the mechanism for transport of

Correct Answer
verified

Most of the lipids composing biological membranes are called _______.

Correct Answer
verified

In facilitated diffusion,

Correct Answer
verified

Secondary active transport resembles transport by ion channels in that

Correct Answer
verified

Specialized channel proteins called connexons occur in

Correct Answer
verified

Correct Answer
verified

The compounds in biological membranes that form a barrier to the movement of hydrophilic materials across the membrane are

Correct Answer
verified

Which of the following statements regarding osmosis is false?

Correct Answer
verified

The sodium-potassium pump of cell membranes is an example of a coupled transport called a(n) _______.

Correct Answer
verified

Exam 6: Cell Membranes

In animals, cell recognition

Correct AnswerverifiedShow Answer

The process of _______ involves coated pits, clathrin, and coated vesicles.

Correct Answerverifiedreceptor-m...View AnswerShow Answer

Which of the following statements about cholesterol molecules is true?

Correct AnswerverifiedShow Answer

Facilitated diffusion

Correct AnswerverifiedShow Answer

Which of the following is not a function of plasma membranes?

Correct AnswerverifiedShow Answer

You are studying how the protein transferrin enters cells. When you examine cells that have taken up transferrin, you find it inside clathrin-coated vesicles. Therefore, the most likely mechanism for uptake of transferrin is

Correct AnswerverifiedShow Answer

The cells that make up a few animals, such as sponges, can be mechanically separated but then will re-form themselves over time. How are the separated cells able to reorganize themselves?

Correct AnswerverifiedThe cells in the sponge have the ability...View AnswerShow Answer

Learning about the formation and operation of plasma membranes may give scientists insights into a disease characterized by plaques and extreme forgetfulness called _______.

Correct AnswerverifiedShow Answer

When a hormone molecule binds to a specific protein on the plasma membrane, the protein it binds to is called a

Correct AnswerverifiedShow Answer

The coupled transport system by which glucose and sodium ions simultaneously enter intestinal epithelial cells is called _______.

Correct AnswerverifiedShow Answer

Which of the following statements about the proteins of the plasma membrane and the proteins of the inner mitochondrial membrane is true?

Correct AnswerverifiedShow Answer

Receptor-mediated endocytosis is the mechanism for transport of

Correct AnswerverifiedShow Answer

Most of the lipids composing biological membranes are called _______.

Correct AnswerverifiedShow Answer

In facilitated diffusion,

Correct AnswerverifiedShow Answer

Secondary active transport resembles transport by ion channels in that

Correct AnswerverifiedShow Answer

Specialized channel proteins called connexons occur in

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The compounds in biological membranes that form a barrier to the movement of hydrophilic materials across the membrane are

Correct AnswerverifiedShow Answer

Which of the following statements regarding osmosis is false?

Correct AnswerverifiedShow Answer

The sodium-potassium pump of cell membranes is an example of a coupled transport called a(n) _______.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
receptor-m...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The cells in the sponge have the ability...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
verified

Correct Answer
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