Question 1

Permeability refers to

Accepted Answer

A)   the movement of molecules from an area of greater concentration to an area of lesser concentration.
B)   the extent to which a membrane allows a substance to pass through.
C)   the amount of solute in a solution.
D)   the state of being permanent.
E)   the ability to establish a permanent solute level in a solution.F) B) and D)
G) D) and E)

Question 2

Blood type is determined by proteins. Blood type A has a different protein than blood type B. Blood type AB has both types of proteins and type O does not have either type of protein. When blood is transfused, the recipient's immune system will detect any new or foreign proteins. The blood type proteins must be located

Accepted Answer

A)   in the red blood cell nucleus.
B)   inside the red blood cell cytoplasm.
C)   on the outer surface of the red blood cell membrane.
D)   in the nuclear membrane.
E)   in the endoplasmic reticulum of the red blood cells.F) C) and D)
G) A) and E)

Question 3

What property of phospholipids makes them suitable for the formation of the double layer found in membranes?

Accepted Answer

A)   They are uncharged.
B)   They can interact with proteins.
C)   They are composed of fatty acids.
D)   They have both a hydrophobic and a hydrophilic end.
E)   Both ends are hydrophilic.F) A) and E)
G) A) and B)

Question 4

If a selectively permeable membrane separates a molasses solution from distilled water, over time the

Accepted Answer

A)   molasses will be found in the water.
B)   molasses will become more dilute.
C)   molasses solution will become more concentrated.
D)   molasses will be found in water and it will be more concentrated.
E)   solutions will remain the same.F) A) and B)
G) D) and E)

Question 5

The pressure that is generated when water flows through a differentially permeable membrane is termed

Accepted Answer

A)   osmotic pressure.
B)   turgor pressure.
C)   plasmolysis.
D)   crenation.
E)   tonicity.F) B) and D)
G) D) and E)

Question 6

If you have a 10% sugar solution and a 35% sugar solution, the 10% solution is ________ compared to the 35% solution.

Accepted Answer

A)   isotonic
B)   sweeter
C)   osmotic
D)   hypotonic
E)   hypertonicF) C) and D)
G) A) and E)

Question 7

Which membrane transport process can continue whether the cell is alive or dead?

Accepted Answer

A)   sodium/potassium pump
B)   pinocytosis
C)   phagocytosis
D)   exocytosis
E)   diffusionF) D) and E)
G) A) and B)

Question 8

If a particular molecule is brought into the cell by receptor-medicated endocytosis, then changing the receptors will change the molecule that is being transported.

Accepted Answer

A) True 
 B)False

Question 9

Our body recognizes the foreign nature of a parasite or disease agent and we soon build up antibodies. A few parasites can change their identity to evade our immune system. How could cells do this on a regular basis?

Accepted Answer

A)   Replace the cholesterol within the membrane with host cholesterol.
B)   Wait for the evolution of new protein membrane molecules.
C)   Because the membrane is "set," a cell must reproduce and then the cell with the old membrane must die.
D)   A whole new phospholipid bilayer is generated to replace the old layer.
E)   New glycoproteins, similar to those found on the host cells, are produced in the cell and moved into the plasma membrane.F) A) and C)
G) A) and B)

Question 10

Carrier molecules are required for

Accepted Answer

A)   osmosis.
B)   both osmosis AND diffusion.
C)   facilitated diffusion.
D)   active transport.
E)   both facilitated diffusion AND active transport.F) B) and E)
G) D) and E)

Question 11

Certain individuals with a Y chromosome develop into females because testosterone is unable to induce the formation of male sexual characteristics. This is most likely due to a defect in

Accepted Answer

A)   the signaling molecule.
B)   the receptor.
C)   the transduction pathway.
D)   the target protein.
E)   the Y chromosome.F) C) and D)
G) B) and E)

Question 12

Which of the following molecules add stiffness and strength to the plasma membrane?

Accepted Answer

A)   glycoproteins
B)   cholesterol
C)   phospholipids
D)   enzymatic proteins
E)   phosphate groupsF) All of the above
G) A) and B)

Question 13

When you cut into most active plant tissue, water appears almost immediately because plant cells contain

Accepted Answer

A)   a hypertonic solution that produces turgor pressure.
B)   a hypotonic solution that produces turgor pressure.
C)   an isotonic condition and you cut the cell open.
D)   a hypertonic condition and cutting it reversed this to hypotonic.
E)   a hypotonic condition and cutting it reversed this to hypertonic.F) A) and D)
G) A) and C)

Question 14

Which is a correct example of tonicity?

Accepted Answer

A)   Distilled water is hypertonic to red blood cells.
B)   Turgor pressure is created when a plant cell swells in a hypotonic solution.
C)   Plasmolysis results from plant cells in hypotonic solutions.
D)   Crenated red blood cells result when they are placed in a hypotonic solution.
E)   If a cell is placed in a hypertonic solution, water enters the cell.F) B) and D)
G) B) and C)

Question 15

Osmosis can occur when a membrane is

Accepted Answer

A)   impermeable.
B)   selectively permeable.
C)   permeable.
D)   plasmolyzed.
E)   absent.F) None of the above
G) D) and E)

Exam 4: Membrane Structure and Function

Which is a correct example of tonicity?

Correct Answer
verified

Permeability refers to

Correct Answer
verified

Which membrane transport process can continue whether the cell is alive or dead?

Correct Answer
verified

When you cut into most active plant tissue, water appears almost immediately because plant cells contain

Correct Answer
verified

Osmosis can occur when a membrane is

Correct Answer
verified

If a particular molecule is brought into the cell by receptor-medicated endocytosis, then changing the receptors will change the molecule that is being transported.

Correct Answer
verified

Carrier molecules are required for

Correct Answer
verified

Certain individuals with a Y chromosome develop into females because testosterone is unable to induce the formation of male sexual characteristics. This is most likely due to a defect in

Correct Answer
verified

If a selectively permeable membrane separates a molasses solution from distilled water, over time the

Correct Answer
verified

What property of phospholipids makes them suitable for the formation of the double layer found in membranes?

Correct Answer
verified

Our body recognizes the foreign nature of a parasite or disease agent and we soon build up antibodies. A few parasites can change their identity to evade our immune system. How could cells do this on a regular basis?

Correct Answer
verified

If you have a 10% sugar solution and a 35% sugar solution, the 10% solution is ________ compared to the 35% solution.

Correct Answer
verified

Correct Answer
verified

Which of the following molecules add stiffness and strength to the plasma membrane?

Correct Answer
verified

The pressure that is generated when water flows through a differentially permeable membrane is termed

Correct Answer
verified

Exam 4: Membrane Structure and Function

Which is a correct example of tonicity?

Correct AnswerverifiedShow Answer

Permeability refers to

Correct AnswerverifiedShow Answer

Which membrane transport process can continue whether the cell is alive or dead?

Correct AnswerverifiedShow Answer

When you cut into most active plant tissue, water appears almost immediately because plant cells contain

Correct AnswerverifiedShow Answer

Osmosis can occur when a membrane is

Correct AnswerverifiedShow Answer

If a particular molecule is brought into the cell by receptor-medicated endocytosis, then changing the receptors will change the molecule that is being transported.

Correct AnswerverifiedShow Answer

Carrier molecules are required for

Correct AnswerverifiedShow Answer

Certain individuals with a Y chromosome develop into females because testosterone is unable to induce the formation of male sexual characteristics. This is most likely due to a defect in

Correct AnswerverifiedShow Answer

If a selectively permeable membrane separates a molasses solution from distilled water, over time the

Correct AnswerverifiedShow Answer

What property of phospholipids makes them suitable for the formation of the double layer found in membranes?

Correct AnswerverifiedShow Answer

Our body recognizes the foreign nature of a parasite or disease agent and we soon build up antibodies. A few parasites can change their identity to evade our immune system. How could cells do this on a regular basis?

Correct AnswerverifiedShow Answer

If you have a 10% sugar solution and a 35% sugar solution, the 10% solution is ________ compared to the 35% solution.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following molecules add stiffness and strength to the plasma membrane?

Correct AnswerverifiedShow Answer

The pressure that is generated when water flows through a differentially permeable membrane is termed

Correct AnswerverifiedShow Answer

Correct Answer
verified

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