Question 1

Which statement about osmosis is not true?

Accepted Answer

A)   It obeys the laws of diffusion.
B)   In animal tissues, water moves into cells if they are hypertonic to their environment.
C)   Red blood cells must be kept in a plasma that is hypotonic to the cells.
D)   Two cells with identical solute concentrations are isotonic to each other.
E)   Solute concentration is the principal factor in osmosis.F) A) and E)
G) A) and D)

Question 2

Cell adhesion molecules that are responsible for the binding together of mammalian egg and sperm cells are referred to as _______.

Accepted Answer

heterotypic

Question 3

The processes of cell recognition and cell adhesion are dependent upon _______ proteins.

Accepted Answer

The answer of The processes of cell recognition and cell...

Question 4

Barrier formation is only one function of the cell membrane. Describe some other functions of the membrane and discuss how the membrane is suited for those functions.

Accepted Answer

Membranes function in processing energy ...

Question 5

Which of the following functions as a recognition signal for interactions between cells?

Accepted Answer

A)   RNA
B)   Phospholipids
C)   Cholesterol
D)   Fatty acids
E)   GlycolipidsF) All of the above
G) A) and E)

Question 6

Which of the following statements about peripheral membrane proteins is true?

Accepted Answer

A)   They have hydrophobic regions within the lipid portion of the bilayer.
B)   They have hydrophilic regions that protrude in aqueous environments on either side of the membrane.
C)   They move laterally but not vertically within the bilayer.
D)   They control the rate of diffusion.
E)   Their polar regions interact with similar regions of integral membrane proteins.F) A) and E)
G) A) and B)

Question 7

Which of the following is an example of passive transport?

Accepted Answer

A)   Facilitated diffusion
B)   The sodium-potassium pump
C)   Phagocytosis
D)   Exocytosis
E)   PinocytosisF) A) and E)
G) C) and E)

Question 8

The ability of some materials to move through biological membranes more readily than through others is called _______.

Accepted Answer

selective ...

Question 9

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

Accepted Answer

A)   only in muscle cell membranes.
B)   associated with the fatty acid region of the lipids.
C)   in the interior of the membrane.
D)   exposed on the surface of the membrane.
E)   either on the surface or inserted into the interior of the membrane.F) A) and B)
G) A) and C)

Question 10

Primary and secondary active transport both

Accepted Answer

A)   generate ATP.
B)   are based on passive movement of Na+ ions.
C)   include the passive movement of glucose molecules.
D)   use ATP directly.
E)   can move solutes against their concentration gradients.F) A) and E)
G) A) and D) E

Question 11

Which of the following statements regarding cellular membranes is false?

Accepted Answer

A)   The hydrophobic nature of the phospholipid tails limits the migration of polar molecules across the membrane.
B)   Integral proteins and phospholipids move fluidly throughout the membrane.
C)   Membrane phospholipids flip back and forth from one side of the bilayer to the other.
D)   Glycolipids and glycoproteins serve as recognition sites on the cell membrane.
E)   All of the above are true.F) A) and B)
G) A) and C)

Question 12

If a red blood cell is placed in an isotonic solution, it will

Accepted Answer

A)   shrivel.
B)   swell and burst.
C)   shrivel and then return to normal.
D)   swell and then return to normal.
E)   take up and release water at an equal rate.F) C) and D)
G) B) and E)

Question 13

Which of the following cell membrane components serve as recognition signals for interactions between cells?

Accepted Answer

A)   Cholesterol
B)   Glycolipids or glycoproteins
C)   Phospholipids
D)   Carrier proteins
E)   All of the aboveF) B) and C)
G) A) and D)

Question 14

Muscle cells recognize and adhere to one another because of specific membrane proteins called

Accepted Answer

A)   coated vesicles.
B)   cell adhesion molecules.
C)   glycolipids.
D)   carrier molecules.
E)   transport proteins.F) None of the above
G) All of the above

Question 15

In which of the following is solution X hypotonic relative to solution Y?

Accepted Answer

A)   Solution X has a greater solute concentration than solution Y.
B)   Solution X has a lower solute concentration than solution Y.
C)   Solution X and solution Y have the same solute concentration.
D)   All of the above
E)   None of the aboveF) A) and D)
G) D) and E)

Question 16

One result of the movement of ions through ion channels is the creation of a membrane potential. The membrane potential is

Accepted Answer

A)   a charge imbalance across the plasma membrane.
B)   the difference in ion concentrations on either side of the plasma membrane.
C)   the difference in ATP concentrations on either side of the plasma membrane.
D)   the capacity for active transport.
E)   the ability of macromolecules to recognize and adhere to one another.F) B) and C)
G) C) and E)

Question 17

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. 
-According to the graph, as the number of glucose molecules increases, the rate of diffusion

Accepted Answer

A)   increases indefinitely.
B)   decreases.
C)   increases until a plateau is reached.
D)   can either increase or decrease.
E)   remains the same.F) B) and D)
G) C) and D) C

Question 18

Which of the following are not specialized cell junctions?

Accepted Answer

A)   Gap junctions
B)   Tight junctions
C)   Desmosomes
D)   Cytoplasmic plaques
E)   Both a and bF) A) and C)
G) A) and B)

Question 19

An important function of specialized membranes found in certain organelles is to

Accepted Answer

A)   help the organelles move.
B)   protect the organelles from increased temperatures.
C)   transform energy.
D)   make use of the cells' internal genetic information.
E)   destroy cellular waste products.F) A) and D)
G) B) and E)

Question 20

Membrane segments synthesized on the ER move to other points of the cell in the form of _______.

Accepted Answer

The answer of Membrane segments synthesized on the ER move...

Exam 6: Cell Membranes

Which statement about osmosis is not true?

Correct Answer
verified

Cell adhesion molecules that are responsible for the binding together of mammalian egg and sperm cells are referred to as _______.

Correct Answer
verified
heterotypic

The processes of cell recognition and cell adhesion are dependent upon _______ proteins.

Correct Answer
verified

Barrier formation is only one function of the cell membrane. Describe some other functions of the membrane and discuss how the membrane is suited for those functions.

Correct Answer
verified
Membranes function in processing energy ...
View Answer

Which of the following functions as a recognition signal for interactions between cells?

Correct Answer
verified

Which of the following statements about peripheral membrane proteins is true?

Correct Answer
verified

Which of the following is an example of passive transport?

Correct Answer
verified

The ability of some materials to move through biological membranes more readily than through others is called _______.

Correct Answer
verified
selective ...
View Answer

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

Correct Answer
verified

Primary and secondary active transport both

Correct Answer
verified
E

Which of the following statements regarding cellular membranes is false?

Correct Answer
verified

If a red blood cell is placed in an isotonic solution, it will

Correct Answer
verified

Which of the following cell membrane components serve as recognition signals for interactions between cells?

Correct Answer
verified

Muscle cells recognize and adhere to one another because of specific membrane proteins called

Correct Answer
verified

In which of the following is solution X hypotonic relative to solution Y?

Correct Answer
verified

One result of the movement of ions through ion channels is the creation of a membrane potential. The membrane potential is

Correct Answer
verified

Correct Answer
verified
C

Which of the following are not specialized cell junctions?

Correct Answer
verified

An important function of specialized membranes found in certain organelles is to

Correct Answer
verified

Membrane segments synthesized on the ER move to other points of the cell in the form of _______.

Correct Answer
verified

Exam 6: Cell Membranes

Which statement about osmosis is not true?

Correct AnswerverifiedShow Answer

Cell adhesion molecules that are responsible for the binding together of mammalian egg and sperm cells are referred to as _______.

Correct Answerverifiedheterotypic

The processes of cell recognition and cell adhesion are dependent upon _______ proteins.

Correct AnswerverifiedShow Answer

Barrier formation is only one function of the cell membrane. Describe some other functions of the membrane and discuss how the membrane is suited for those functions.

Correct AnswerverifiedMembranes function in processing energy ...View AnswerShow Answer

Which of the following functions as a recognition signal for interactions between cells?

Correct AnswerverifiedShow Answer

Which of the following statements about peripheral membrane proteins is true?

Correct AnswerverifiedShow Answer

Which of the following is an example of passive transport?

Correct AnswerverifiedShow Answer

The ability of some materials to move through biological membranes more readily than through others is called _______.

Correct Answerverifiedselective ...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

Primary and secondary active transport both

Correct AnswerverifiedE

Which of the following statements regarding cellular membranes is false?

Correct AnswerverifiedShow Answer

If a red blood cell is placed in an isotonic solution, it will

Correct AnswerverifiedShow Answer

Which of the following cell membrane components serve as recognition signals for interactions between cells?

Correct AnswerverifiedShow Answer

Muscle cells recognize and adhere to one another because of specific membrane proteins called

Correct AnswerverifiedShow Answer

In which of the following is solution X hypotonic relative to solution Y?

Correct AnswerverifiedShow Answer

One result of the movement of ions through ion channels is the creation of a membrane potential. The membrane potential is

Correct AnswerverifiedShow Answer

Correct AnswerverifiedC

Which of the following are not specialized cell junctions?

Correct AnswerverifiedShow Answer

An important function of specialized membranes found in certain organelles is to

Correct AnswerverifiedShow Answer

Membrane segments synthesized on the ER move to other points of the cell in the form of _______.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
heterotypic

Correct Answer
verified

Correct Answer
verified
Membranes function in processing energy ...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
selective ...
View Answer

Correct Answer
verified

Correct Answer
verified
E

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified