Biology 108 Quiz Questions With
Complete Solutions
The compounds in biological membranes that form a barrier to the
| | | | | | | | | | |
movement of hydrophilic materials across the membrane are: -
| | | | | | | | |
CORRECT ANSWER✔✔-lipids |
The plasma membrane of animals contains carbohydrates: - CORRECT
| | | | | | | | |
ANSWER✔✔-on outer side of membrane, protruding into environment
| | | | | | |
In biological membranes, the phospholipids are arranged in a: -
| | | | | | | | | |
CORRECT ANSWER✔✔-bilayer, with fatty acids pointing toward each
| | | | | | | |
other
Peripheral membrane proteins have - CORRECT ANSWER✔✔-polar
| | | | | | |
regions that interact with similar regions of integral membrane proteins
| | | | | | | | |
A protein that forms an ion channel the
| | | | | | |
rough a membrane is most likely to
| | | | | |
be: - CORRECT ANSWER✔✔-a transmembrane protein
| | | | |
,Protein movement throughout the plasma membrane may be restricted
| | | | | | | |
by: - CORRECT ANSWER✔✔-cytoskeleton and lipid rafts
| | | | | | |
When vesicles from the Golgi apparatus
| | | | |
deliver their contents to the exterior
| | | | |
of the cell, they add their membranes
| | | | | |
to the plasma membrane. The plasma
| | | | |
membrane does not increase in size, because: - CORRECT ANSWER✔✔-
| | | | | | | | |
membrane is continually being lost from plasma membrane by
| | | | | | | | |
endocytosis
Muscle cells recognize and adhere to one another because of specific
| | | | | | | | | | |
membrane proteins called: - CORRECT ANSWER✔✔-glycoproteins
| | | | |
The difference between tight junctions,
| | | |
desmosomes, and gap junctions is | | | |
that: - CORRECT ANSWER✔✔-tight junctions and desmosomes have
| | | | | | | |
mechanical roles, whereas gap junctions facilitate communication
| | | | | | |
between cells |
Which of the following statements about diffusion is FALSE? - CORRECT
| | | | | | | | | | |
ANSWER✔✔-simple diffusion across cell membranes depends upon | | | | | | |
specific carrier protein | |
, Which of the following is an example of active transport ? - CORRECT
| | | | | | | | | | | | |
ANSWER✔✔-movement of potassium ions into cell | | | | |
A concentration gradient of glucose across a membrane means that: -
| | | | | | | | | | |
CORRECT ANSWER✔✔-glucose molecules are more crowded on one
| | | | | | | |
side of the membrane that on the other
| | | | | | |
The difference between osmosis and diffusion is that: - CORRECT
| | | | | | | | | |
ANSWER✔✔-osmosis refers to the movement of water, whereas | | | | | | | |
diffusion is the movement of molecules
| | | | |
Which of the following molecules is the
| | | | | |
most likely to diffuse directly across a
| | | | | |
cell membrane without the assistance of a protein? - CORRECT
| | | | | | | | | |
ANSWER✔✔-steroid
If a red blood cell is placed
| | | | | |
in an isotonic solution: - CORRECT ANSWER✔✔-water moves into and
| | | | | | | | | |
out of cell at an equal rate and thus the cell will retain its original shape
| | | | | | | | | | | | | | |
Active transport moves molecules: - CORRECT ANSWER✔✔-in opposite
| | | | | | | |
direction in which diffusion moves them
| | | | |
Complete Solutions
The compounds in biological membranes that form a barrier to the
| | | | | | | | | | |
movement of hydrophilic materials across the membrane are: -
| | | | | | | | |
CORRECT ANSWER✔✔-lipids |
The plasma membrane of animals contains carbohydrates: - CORRECT
| | | | | | | | |
ANSWER✔✔-on outer side of membrane, protruding into environment
| | | | | | |
In biological membranes, the phospholipids are arranged in a: -
| | | | | | | | | |
CORRECT ANSWER✔✔-bilayer, with fatty acids pointing toward each
| | | | | | | |
other
Peripheral membrane proteins have - CORRECT ANSWER✔✔-polar
| | | | | | |
regions that interact with similar regions of integral membrane proteins
| | | | | | | | |
A protein that forms an ion channel the
| | | | | | |
rough a membrane is most likely to
| | | | | |
be: - CORRECT ANSWER✔✔-a transmembrane protein
| | | | |
,Protein movement throughout the plasma membrane may be restricted
| | | | | | | |
by: - CORRECT ANSWER✔✔-cytoskeleton and lipid rafts
| | | | | | |
When vesicles from the Golgi apparatus
| | | | |
deliver their contents to the exterior
| | | | |
of the cell, they add their membranes
| | | | | |
to the plasma membrane. The plasma
| | | | |
membrane does not increase in size, because: - CORRECT ANSWER✔✔-
| | | | | | | | |
membrane is continually being lost from plasma membrane by
| | | | | | | | |
endocytosis
Muscle cells recognize and adhere to one another because of specific
| | | | | | | | | | |
membrane proteins called: - CORRECT ANSWER✔✔-glycoproteins
| | | | |
The difference between tight junctions,
| | | |
desmosomes, and gap junctions is | | | |
that: - CORRECT ANSWER✔✔-tight junctions and desmosomes have
| | | | | | | |
mechanical roles, whereas gap junctions facilitate communication
| | | | | | |
between cells |
Which of the following statements about diffusion is FALSE? - CORRECT
| | | | | | | | | | |
ANSWER✔✔-simple diffusion across cell membranes depends upon | | | | | | |
specific carrier protein | |
, Which of the following is an example of active transport ? - CORRECT
| | | | | | | | | | | | |
ANSWER✔✔-movement of potassium ions into cell | | | | |
A concentration gradient of glucose across a membrane means that: -
| | | | | | | | | | |
CORRECT ANSWER✔✔-glucose molecules are more crowded on one
| | | | | | | |
side of the membrane that on the other
| | | | | | |
The difference between osmosis and diffusion is that: - CORRECT
| | | | | | | | | |
ANSWER✔✔-osmosis refers to the movement of water, whereas | | | | | | | |
diffusion is the movement of molecules
| | | | |
Which of the following molecules is the
| | | | | |
most likely to diffuse directly across a
| | | | | |
cell membrane without the assistance of a protein? - CORRECT
| | | | | | | | | |
ANSWER✔✔-steroid
If a red blood cell is placed
| | | | | |
in an isotonic solution: - CORRECT ANSWER✔✔-water moves into and
| | | | | | | | | |
out of cell at an equal rate and thus the cell will retain its original shape
| | | | | | | | | | | | | | |
Active transport moves molecules: - CORRECT ANSWER✔✔-in opposite
| | | | | | | |
direction in which diffusion moves them
| | | | |
