Biology Chapter 7 Quiz
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1. 1) Which of the following statements best describes a C) They are amphipath-
characteristic feature of integral membrane proteins? ic, with at least one hy-
drophobic
A) They are hydrophilic.
B) They are hydrophobic.
C) They are amphipathic, with at least one hydrophobic
region.
D) They are localized to the interior surface of the
membrane.
2. 2) A phospholipid bilayer with equal amounts of sat- A) Permeability to glucose
urated and unsaturated fatty acids displays a specific will increase.
permeability to glucose. What effect will increasing the
proportion of unsaturated fatty acids in the bilayer
have on the membrane's permeability to glucose?
A) Permeability to glucose will increase.
B) Permeability to glucose will decrease.
C) Permeability to glucose will stay the same.
D) Permeability will decrease initially then increase as
the bilayer fills with glucose.
3. 3) Which of the following statements best describes a A) Phospholipids move lat-
characteristic of biological membranes? erally within the plane of
the membrane.
A) Phospholipids move laterally within the plane of the
membrane.
B) Phospholipids frequently flip-flop from one layer of
the membrane to the other.
C) Phospholipids generally occur in an uninterrupted
bilayer, with membrane proteins restricted to the sur-
face of the membrane.
, Biology Chapter 7 Quiz
Study online at https://quizlet.com/_jmvvd4
D) Phospholipids are arranged with hydrophilic tails in
the interior of the membrane.
4. 4) Which of the following statements best explains how A) The membranes con-
the membranes in winter wheat are able to remain tain an increased propor-
fluid in extremely cold temperatures? tion of unsaturated phos-
pholipids.
A) The membranes contain an increased proportion of
unsaturated phospholipids.
B) The membranes contain a reduced proportion of
cholesterol molecules.
C) The membranes contain a reduced proportion of
hydrophobic proteins.
D) The membranes contain an increased proportion of
glycolipids.
5. 5) Which of the following statements best describes D) The membrane is com-
the structure of a membrane based on the fluid mosaic posed of a fluid bilayer
model? of phospholipids with em-
bedded amphipathic
A) The membrane is composed of a fluid bilayer of
phospholipids between two layers of hydrophilic pro-
teins.
B) The membrane is composed of a single layer of
fluid phospholipids between two layers of hydrophilic
proteins.
C) The membrane is composed of a mosaic of fluid
polysaccharides and amphipathic proteins.
D) The membrane is composed of a fluid bilayer of
phospholipids with embedded amphipathic
6. 6) An animal cell that lacks carbohydrates on the ex- B) cell-cell recognition
ternal surface of its plasma membrane would likely be
, Biology Chapter 7 Quiz
Study online at https://quizlet.com/_jmvvd4
impaired in which of the following functions?
A) transporting ions against an electrochemical gradi-
ent
B) cell-cell recognition
C) attaching the plasma membrane to the cytoskele-
ton
D) establishing a diffusion barrier to charged mole-
cules
7. 7) Which of the following types of molecules are most C) peripheral membrane
likely to be excluded from the hydrophobic portion of proteins
the phospholipid bilayer?
A) transmembrane proteins
B) integral membrane proteins
C) peripheral membrane proteins
D) cholesterol
8. 8) Which of the following types of molecules are most D) cholesterol
likely to lack hydrophilic domains?
A) transmembrane proteins
B) ion transport proteins
C) peripheral membrane proteins
D) cholesterol
9. 9) Which of the following statements best explains D) There are only weak hy-
the reason that lipids and proteins are free to move drophobic interactions in
laterally in membranes? the interior of the mem-
brane
A) The interior of the membrane is filled with liquid
water.
Study online at https://quizlet.com/_jmvvd4
1. 1) Which of the following statements best describes a C) They are amphipath-
characteristic feature of integral membrane proteins? ic, with at least one hy-
drophobic
A) They are hydrophilic.
B) They are hydrophobic.
C) They are amphipathic, with at least one hydrophobic
region.
D) They are localized to the interior surface of the
membrane.
2. 2) A phospholipid bilayer with equal amounts of sat- A) Permeability to glucose
urated and unsaturated fatty acids displays a specific will increase.
permeability to glucose. What effect will increasing the
proportion of unsaturated fatty acids in the bilayer
have on the membrane's permeability to glucose?
A) Permeability to glucose will increase.
B) Permeability to glucose will decrease.
C) Permeability to glucose will stay the same.
D) Permeability will decrease initially then increase as
the bilayer fills with glucose.
3. 3) Which of the following statements best describes a A) Phospholipids move lat-
characteristic of biological membranes? erally within the plane of
the membrane.
A) Phospholipids move laterally within the plane of the
membrane.
B) Phospholipids frequently flip-flop from one layer of
the membrane to the other.
C) Phospholipids generally occur in an uninterrupted
bilayer, with membrane proteins restricted to the sur-
face of the membrane.
, Biology Chapter 7 Quiz
Study online at https://quizlet.com/_jmvvd4
D) Phospholipids are arranged with hydrophilic tails in
the interior of the membrane.
4. 4) Which of the following statements best explains how A) The membranes con-
the membranes in winter wheat are able to remain tain an increased propor-
fluid in extremely cold temperatures? tion of unsaturated phos-
pholipids.
A) The membranes contain an increased proportion of
unsaturated phospholipids.
B) The membranes contain a reduced proportion of
cholesterol molecules.
C) The membranes contain a reduced proportion of
hydrophobic proteins.
D) The membranes contain an increased proportion of
glycolipids.
5. 5) Which of the following statements best describes D) The membrane is com-
the structure of a membrane based on the fluid mosaic posed of a fluid bilayer
model? of phospholipids with em-
bedded amphipathic
A) The membrane is composed of a fluid bilayer of
phospholipids between two layers of hydrophilic pro-
teins.
B) The membrane is composed of a single layer of
fluid phospholipids between two layers of hydrophilic
proteins.
C) The membrane is composed of a mosaic of fluid
polysaccharides and amphipathic proteins.
D) The membrane is composed of a fluid bilayer of
phospholipids with embedded amphipathic
6. 6) An animal cell that lacks carbohydrates on the ex- B) cell-cell recognition
ternal surface of its plasma membrane would likely be
, Biology Chapter 7 Quiz
Study online at https://quizlet.com/_jmvvd4
impaired in which of the following functions?
A) transporting ions against an electrochemical gradi-
ent
B) cell-cell recognition
C) attaching the plasma membrane to the cytoskele-
ton
D) establishing a diffusion barrier to charged mole-
cules
7. 7) Which of the following types of molecules are most C) peripheral membrane
likely to be excluded from the hydrophobic portion of proteins
the phospholipid bilayer?
A) transmembrane proteins
B) integral membrane proteins
C) peripheral membrane proteins
D) cholesterol
8. 8) Which of the following types of molecules are most D) cholesterol
likely to lack hydrophilic domains?
A) transmembrane proteins
B) ion transport proteins
C) peripheral membrane proteins
D) cholesterol
9. 9) Which of the following statements best explains D) There are only weak hy-
the reason that lipids and proteins are free to move drophobic interactions in
laterally in membranes? the interior of the mem-
brane
A) The interior of the membrane is filled with liquid
water.
