Question 1

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) None of the above
G) B) and E)

Question 2

One way to determine whether something is being actively transported across a membrane,is to compare its rate of transport with and without a chemical that blocks ATP production.

Accepted Answer

A) True 
 B)False

Question 3

When a plant cell is placed in a hypotonic solution,the cell wall prevents

Accepted Answer

A)   diffusion.
B)   active transport.
C)   the cell from bursting.
D)   the cell from shrinking.
E)   water from entering the cell.F) B) and E)
G) A) and D)

Question 4

Which components of a cell membrane are used for cell-to-cell recognition?

Accepted Answer

A)   phospholipids
B)   proteins
C)   glycolipids
D)   glycoproteins
E)   cholesterol moleculesF) D) and E)
G) A) and E)

Question 5

Certain individuals with a Y chromosome develop into females because testosterone is not able 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 chromosomeF) C) and D)
G) A) and B) B

Question 6

Dead plants seen alongside a salted roadway died because the saline solution caused the cells to

Accepted Answer

A)   undergo crenation.
B)   undergo lysis.
C)   undergo hemolysis.
D)   undergo plasmolysis.
E)   the saline solution did not have an effect on the plants.F) B) and E)
G) A) and E)

Question 7

Which is the most common type of intercellular junction between skin cells?

Accepted Answer

A)   adhesion junctions
B)   gap junctions
C)   tight junctions
D)   plasmodesmata
E)   None of these are found between skin cells.F) D) and E)
G) None of the above

Question 8

What will happen to the water level in Figure 4.1?

Accepted Answer

A)  It will rise in side A.
B)  It will rise in side B.
C)  It will remain the same on both sides.
D)  It will rise on both sides of the membrane.
E)  It will decrease on both sides of the membraneF) All of the above
G) C) and E)

Question 9

Which intercellular junction allows for the rapid movement of small molecules or ions to flow from one animal cell to the next?

Accepted Answer

A)   gap junctions
B)   tight junctions
C)   adhesion junctions
D)   desmosomes
E)   plasmodesmataF) C) and D)
G) C) and E)

Question 10

Which component of the extracellualr matrix is responsible for forming proteoglycans?

Accepted Answer

A)   Amino sugars
B)   Fibronectin
C)   Collagen
D)   Elastin
E)   IntegrinF) B) and D)
G) A) and B)

Question 11

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 12

If a cell lacks ATP,which of the following processes would cease to operate immediately?

Accepted Answer

A)   diffusion
B)   sodium/potassium pump
C)   facilitated diffusion
D)   osmosis
E)   tonicityF) B) and E)
G) C) and D)

Question 13

Which type of membrane protein will be used to bind to hormones?

Accepted Answer

A)   channel proteins
B)   carrier proteins
C)   cell recognition proteins
D)   receptor proteins
E)   enzymatic proteinsF) B) and D)
G) A) and B)

Question 14

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

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) All of the above
G) A) and E)

Question 15

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 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 are produced in the cell and moved into the plasma membrane.F) D) and E)
G) A) and C) E

Question 16

The same signaling molecule that binds to the receptor on the outside of the cell is used to alter gene expression in the nucleus.

Accepted Answer

A) True 
 B)False  False

Question 17

When blood supplies oxygen and food to a cell surface and these molecules diffuse across,we might expect some "resting time." However,if we inspected most cell membranes in a living human body,we would find a nearly continuous flow of substances back-and-forth across the plasma membrane.Which of the following is not a reason why?

Accepted Answer

A)   Cell metabolism is constantly using up oxygen and raw materials; this lowers their concentration so more will diffuse into the cell.
B)   Cell metabolism is constantly producing waste molecules; this increases their concentration so more will diffuse out of the cell.
C)   Cells produce useful secretions; this increases their concentration and more will diffuse out of the cell.
D)   Cell metabolism constantly produces carbon dioxide in respiration; this increases its concentration so more will diffuse out of the cell.
E)   Cells are living entities and in order to live can never "rest".F) C) and D)
G) A) and B)

Question 18

Radioactive isotopes are used to tag proteins in the cell membranes of mouse cells.These cells are then fused with human cells in cultures.What is the likely consequence of the tagged mouse proteins?

Accepted Answer

A)   The tagged proteins remain in the mouse cells and keep their position on the membrane.
B)   The tagged proteins remain in mouse cells but move anywhere across the mouse cell membrane.
C)   The tagged proteins drift across cell membranes and are soon found dispersed across both human and mouse cell membranes.
D)   None of these will occur since mouse cell membranes are unlike human cell membranes.
E)   None of these will occur since radioactive cells will soon die.F) B) and E)
G) D) and E)

Question 19

A membrane sac filled with large molecules of potassium is suspended in a beaker of water.What will happen?

Accepted Answer

A)   The potassium will leave and the water will enter until both sides reach equal concentrations.
B)   Water will enter the sac and it will swell.
C)   Because the potassium cannot leave, the water cannot enter.
D)   We cannot determine the outcome unless we know the tonicity of the solutions.
E)   The potassium will leave the sac and it will shrink.F) A) and C)
G) C) and D)

Question 20

When a substance moves from an area of low concentration to an area of high concentration while using energy,the process is termed

Accepted Answer

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

Exam 4: Membrane Structure and Function

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

Correct Answer
verified

One way to determine whether something is being actively transported across a membrane,is to compare its rate of transport with and without a chemical that blocks ATP production.

Correct Answer
verified

When a plant cell is placed in a hypotonic solution,the cell wall prevents

Correct Answer
verified

Which components of a cell membrane are used for cell-to-cell recognition?

Correct Answer
verified

Certain individuals with a Y chromosome develop into females because testosterone is not able to induce the formation of male sexual characteristics.This is most likely due to a defect in

Correct Answer
verified
B

Dead plants seen alongside a salted roadway died because the saline solution caused the cells to

Correct Answer
verified

Which is the most common type of intercellular junction between skin cells?

Correct Answer
verified

What will happen to the water level in Figure 4.1?

Correct Answer
verified

Which intercellular junction allows for the rapid movement of small molecules or ions to flow from one animal cell to the next?

Correct Answer
verified

Which component of the extracellualr matrix is responsible for forming proteoglycans?

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

If a cell lacks ATP,which of the following processes would cease to operate immediately?

Correct Answer
verified

Which type of membrane protein will be used to bind to hormones?

Correct Answer
verified

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

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
E

The same signaling molecule that binds to the receptor on the outside of the cell is used to alter gene expression in the nucleus.

Correct Answer
verified
False

Correct Answer
verified

Radioactive isotopes are used to tag proteins in the cell membranes of mouse cells.These cells are then fused with human cells in cultures.What is the likely consequence of the tagged mouse proteins?

Correct Answer
verified

A membrane sac filled with large molecules of potassium is suspended in a beaker of water.What will happen?

Correct Answer
verified

When a substance moves from an area of low concentration to an area of high concentration while using energy,the process is termed

Correct Answer
verified

Exam 4: Membrane Structure and Function

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

Correct AnswerverifiedShow Answer

One way to determine whether something is being actively transported across a membrane,is to compare its rate of transport with and without a chemical that blocks ATP production.

Correct AnswerverifiedShow Answer

When a plant cell is placed in a hypotonic solution,the cell wall prevents

Correct AnswerverifiedShow Answer

Which components of a cell membrane are used for cell-to-cell recognition?

Correct AnswerverifiedShow Answer

Certain individuals with a Y chromosome develop into females because testosterone is not able to induce the formation of male sexual characteristics.This is most likely due to a defect in

Correct AnswerverifiedB

Dead plants seen alongside a salted roadway died because the saline solution caused the cells to

Correct AnswerverifiedShow Answer

Which is the most common type of intercellular junction between skin cells?

Correct AnswerverifiedShow Answer

What will happen to the water level in Figure 4.1?

Correct AnswerverifiedShow Answer

Which intercellular junction allows for the rapid movement of small molecules or ions to flow from one animal cell to the next?

Correct AnswerverifiedShow Answer

Which component of the extracellualr matrix is responsible for forming proteoglycans?

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

If a cell lacks ATP,which of the following processes would cease to operate immediately?

Correct AnswerverifiedShow Answer

Which type of membrane protein will be used to bind to hormones?

Correct AnswerverifiedShow Answer

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

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 AnswerverifiedE

The same signaling molecule that binds to the receptor on the outside of the cell is used to alter gene expression in the nucleus.

Correct AnswerverifiedFalse

Correct AnswerverifiedShow Answer

Radioactive isotopes are used to tag proteins in the cell membranes of mouse cells.These cells are then fused with human cells in cultures.What is the likely consequence of the tagged mouse proteins?

Correct AnswerverifiedShow Answer

A membrane sac filled with large molecules of potassium is suspended in a beaker of water.What will happen?

Correct AnswerverifiedShow Answer

When a substance moves from an area of low concentration to an area of high concentration while using energy,the process is termed

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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B

Correct Answer
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E

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False

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