Question 1

What will happen to the protein solution of side A in Figure 4.1?

Accepted Answer

A) It will become less concentrated since protein will move from A to B. 
B) It will become more concentrated since water passes from B to A. 
C) It will become more concentrated since water passes from A to B. 
D) It will become less concentrated since water passes from B to A. 
E) It will become more concentrated since protein will move from B to A. 
A) It will become less concentrated since protein will move from A to B. 
B) It will become more concentrated since water passes from B to A. 
C) It will become more concentrated since water passes from A to B. 
D) It will become less concentrated since water passes from B to A. 
E) It will become more concentrated since protein will move from B to A.

Question 2

The inside and outside of the plasma membrane are

Accepted Answer

A)  identical in both the phospholipid bilayer and the embedded proteins. 
B)  identical in phospholipid bilayer but have cytoskeletal filaments on the outside and carbohydrate chains of glycolipids and proteins on the inside. 
C)  identical in phospholipid bilayer but have cytoskeletal filaments on the inside and carbohydrate chains of glycolipids and proteins on the outside. 
D)  different with a phospholipid bilayer on the inside and carbohydrate chains of glycolipids and proteins on the outside. 
E)  different with a phospholipid bilayer on the outside and carbohydrate chains of glycolipids and proteins on the inside. 
A)  identical in both the phospholipid bilayer and the embedded proteins. 
B)  identical in phospholipid bilayer but have cytoskeletal filaments on the outside and carbohydrate chains of glycolipids and proteins on the inside. 
C)  identical in phospholipid bilayer but have cytoskeletal filaments on the inside and carbohydrate chains of glycolipids and proteins on the outside. 
D)  different with a phospholipid bilayer on the inside and carbohydrate chains of glycolipids and proteins on the outside. 
E)  different with a phospholipid bilayer on the outside and carbohydrate chains of glycolipids and proteins on the inside.

Question 3

Receptor-mediated endocytosis involves all of the following EXCEPT

Accepted Answer

A)  receptor proteins to bind to specific molecules. 
B)  a coated pit due to a layer of fibrous protein on the cytoplasmic side of the membrane. 
C)  various outcomes from destruction of the vesicle to restoration of the surface configuration. 
D)  the mechanism for regulating exchange between a mother and fetus. 
E)  secretion of materials from a cell. 
A)  receptor proteins to bind to specific molecules. 
B)  a coated pit due to a layer of fibrous protein on the cytoplasmic side of the membrane. 
C)  various outcomes from destruction of the vesicle to restoration of the surface configuration. 
D)  the mechanism for regulating exchange between a mother and fetus. 
E)  secretion of materials from a cell.

Question 4

Insulin formed by the Golgi apparatus in insulin-producing cells leaves those cells by

Accepted Answer

A)  special pore molecules that are embedded in the cell membrane. 
B)  the insulin-filled vesicles fusing with the cell membrane and spilling their contents externally. 
C)  moving along the endoplasmic reticulum until it is outside the cell membrane. 
D)  the Golgi apparatus being connected with external channels directly to the cell membrane. 
E)  diffusion across the cytoplasm. 
A)  special pore molecules that are embedded in the cell membrane. 
B)  the insulin-filled vesicles fusing with the cell membrane and spilling their contents externally. 
C)  moving along the endoplasmic reticulum until it is outside the cell membrane. 
D)  the Golgi apparatus being connected with external channels directly to the cell membrane. 
E)  diffusion across the cytoplasm.

Question 5

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)  diffusion 
A)  sodium/potassium pump 
B)  pinocytosis 
C)  phagocytosis 
D)  exocytosis 
E)  diffusion

Question 6

What two components are commonly found in the extracellular matrix that help resist stretching and provide resilience?

Accepted Answer

A)  proteins & polysaccharides 
B)  proteins & phospholipids 
C)  polysaccharides & phospholipids 
D)  amino acids & phospholipids 
E)  nucleic acids & proteins 
A)  proteins & polysaccharides 
B)  proteins & phospholipids 
C)  polysaccharides & phospholipids 
D)  amino acids & phospholipids 
E)  nucleic acids & proteins

Question 7

Which is a correct example of tonicity?

Accepted Answer

A)  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. 
A)  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.

Question 8

Which is a correct association of protein types?

Accepted Answer

A)  carrier proteins-provide a pathway for substances to move across a membrane 
B)  cell recognition proteins-allow a specific molecule to bind to it and may cause a cell response 
C)  channel proteins-combine with a substance to help it move across a membrane 
D)  receptor proteins-variations in these proteins cause tissue transplant rejection 
E)  enzymatic proteins-carry out metabolic reactions directly 
A)  carrier proteins-provide a pathway for substances to move across a membrane 
B)  cell recognition proteins-allow a specific molecule to bind to it and may cause a cell response 
C)  channel proteins-combine with a substance to help it move across a membrane 
D)  receptor proteins-variations in these proteins cause tissue transplant rejection 
E)  enzymatic proteins-carry out metabolic reactions directly

Question 9

In the emergency room,saline solutions are often run into a person's vein.The saline solution must be

Accepted Answer

A)  0.1% NaCl 
B)  0.5% NaCl 
C)  0.75% NaCl 
D)  0.9% NaCl 
E)  9.0% NaCl 
A)  0.1% NaCl 
B)  0.5% NaCl 
C)  0.75% NaCl 
D)  0.9% NaCl 
E)  9.0% NaCl

Question 10

An isotonic solution means that the solute concentration outside the cell

Accepted Answer

A)  is greater than inside the cell. 
B)  is less than inside the cell. 
C)  is the same as inside the cell. 
D)  has no effect on the cell. 
E)  is greater than outside the cell. 
A)  is greater than inside the cell. 
B)  is less than inside the cell. 
C)  is the same as inside the cell. 
D)  has no effect on the cell. 
E)  is greater than outside the cell.

Question 11

A cell is placed in a solution of large nutrient molecules tagged with a red dye.Soon the cell is dark red,showing a concentration of the nutrient much higher than the external solution.We add a reagent that blocks the use of ATP.What result would you expect from this experiment?

Accepted Answer

A)  The nutrient would continue to rapidly enter the cell by diffusion because as a nutrient it is constantly being used in cell metabolism, so the cell will get redder. 
B)  The color will remain the same since all future transfer will stop. 
C)  The color will fade as the import of the nutrient stops and diffusion evens the concentrations. 
D)  The cell will continue to get darker since the import of the nutrient does not involve ATP. 
E)  The cell will die without access to ATP. 
A)  The nutrient would continue to rapidly enter the cell by diffusion because as a nutrient it is constantly being used in cell metabolism, so the cell will get redder. 
B)  The color will remain the same since all future transfer will stop. 
C)  The color will fade as the import of the nutrient stops and diffusion evens the concentrations. 
D)  The cell will continue to get darker since the import of the nutrient does not involve ATP. 
E)  The cell will die without access to ATP.

Question 12

If the proteins forming the cell junctions within the stomach were denatured,what is a likely consequence?

Accepted Answer

A)  The desmosome junctions would not hold together causing the cells in the stomach to pull apart. 
B)  The tight junctions would not hold together causing the cells in the stomach to pull apart. 
C)  The desmosome junctions would be bonded together more tightly causing the cells in the stomach to form a solid barrier. 
D)  The gap junctions would not hold together causing the cells in the stomach to be unable to pass ions back and forth. 
E)  The desmosome junctions would not hold together causing the cells in the kidney to pull apart. 
A)  The desmosome junctions would not hold together causing the cells in the stomach to pull apart. 
B)  The tight junctions would not hold together causing the cells in the stomach to pull apart. 
C)  The desmosome junctions would be bonded together more tightly causing the cells in the stomach to form a solid barrier. 
D)  The gap junctions would not hold together causing the cells in the stomach to be unable to pass ions back and forth. 
E)  The desmosome junctions would not hold together causing the cells in the kidney to pull apart.

Question 13

Which function does the lipid bilayer component of the plasma membrane NOT provide for the cell?

Accepted Answer

A)  defines a permeable boundary between the organized interior and the chaotic external environment 
B)  provides an impermeable, self-sealing membrane that keeps all internal living processes sealed inside 
C)  controls the exchange of molecules between one cell and adjacent cells or the environment 
D)  provides a fluid and flexible boundary that insulates the interior from the variations in humidity, food, and other external conditions 
E)  provides a matrix for proteins that regulate the exchange of molecules between the inside and outside of the cell 
A)  defines a permeable boundary between the organized interior and the chaotic external environment 
B)  provides an impermeable, self-sealing membrane that keeps all internal living processes sealed inside 
C)  controls the exchange of molecules between one cell and adjacent cells or the environment 
D)  provides a fluid and flexible boundary that insulates the interior from the variations in humidity, food, and other external conditions 
E)  provides a matrix for proteins that regulate the exchange of molecules between the inside and outside of the cell

Question 14

Oxygen diffuses into the capillaries of the lungs because there is

Accepted Answer

A)  a higher concentration of O2 in the alveoli than the capillaries. 
B)  a higher concentration of O2 in the capillaries than the alveoli. 
C)  a higher concentration of CO2 in the alveoli than the capillaries. 
D)  a higher concentration of CO2 in capillaries than the alveoli. 
E)  an equal concentration of O2 in the alveoli and the capillaries. 
A)  a higher concentration of O2 in the alveoli than the capillaries. 
B)  a higher concentration of O2 in the capillaries than the alveoli. 
C)  a higher concentration of CO2 in the alveoli than the capillaries. 
D)  a higher concentration of CO2 in capillaries than the alveoli. 
E)  an equal concentration of O2 in the alveoli and the capillaries.

Question 15

The number of mitochondria in a cell would be a general indicator of the extent of

Accepted Answer

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

Question 16

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

Question 17

Oxygen leaves the alveoli in the lungs and enters the capillaries by endocytosis.

Accepted Answer

A) True 
 B)False

Exam 4: Membrane Structure and Function

What will happen to the protein solution of side A in Figure 4.1?

The inside and outside of the plasma membrane are

Receptor-mediated endocytosis involves all of the following EXCEPT

Insulin formed by the Golgi apparatus in insulin-producing cells leaves those cells by

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

What two components are commonly found in the extracellular matrix that help resist stretching and provide resilience?

Which is a correct example of tonicity?

Which is a correct association of protein types?

In the emergency room,saline solutions are often run into a person's vein.The saline solution must be

An isotonic solution means that the solute concentration outside the cell

A cell is placed in a solution of large nutrient molecules tagged with a red dye.Soon the cell is dark red,showing a concentration of the nutrient much higher than the external solution.We add a reagent that blocks the use of ATP.What result would you expect from this experiment?

If the proteins forming the cell junctions within the stomach were denatured,what is a likely consequence?

Which function does the lipid bilayer component of the plasma membrane NOT provide for the cell?

Oxygen diffuses into the capillaries of the lungs because there is

The number of mitochondria in a cell would be a general indicator of the extent of

Carrier molecules are required for

Oxygen leaves the alveoli in the lungs and enters the capillaries by endocytosis.

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