MICROBIOLOGY EXAM 1# | QUESTIONS
& 100% VERIFIED ANSWERS | LATEST
UPDATE | GRADED A+
How is osmosis different from simple diffusion?
Correct Answer: Water movement is driven by the concentration of solutes rather
than its own concentration.
Nonspecific permeases
Correct Answer: allow a variety of molecules to cross the cytoplasm membrane
What will happen to a cell that is placed in a solution containing a high concentration of
sugar, a molecule that cannot pass across the cell membrane?
Correct Answer: the cell will lose its interior water, causing it to shrivel up and
possibly die
How is simple diffusion different from other types of passive transport?
Correct Answer: Simple diffusion does not require a permease
Why is no energy required in passive transport?
1
,Correct Answer: The concentration gradient drives the movement
Once equilibrium is reached,
Correct Answer: molecules move, but there is no net movement in a particular
direction
Which of the following would not move freely across the cytoplasmic membrane?
Correct Answer: positively charged hydrogen ions
What makes phospholipid membranes good at keeping some molecules out and
allowing others to freely pass?
Correct Answer: They have both hydrophilic ad hydrophobic regions
Integral proteins are mostly involved in
Correct Answer: transport function
How does water enter and exit a cell?
Correct Answer: By simple diffusion or by use of an integral transport protein
A glycoprotein
Correct Answer: is a type of peripheral protein above that can be used as a receptor
or in enzymatic functions
2
, Molecules would be blocked by a cell membrane
Correct Answer: ions
Hydrophobic molecules would enter a cell
Correct Answer: through integral transport proteins
What is a hallmark of passive transport across a cell membrane?
Correct Answer: It occurs along an electrochemical gradient, and may involve the
use of transport proteins
A positively charged sodium ion
Correct Answer: would require the use of integral protein channels to pass through
a cell membrane
Active Transport
Correct Answer: -requires ATP
-requires the use of transport proteins
Active transport type that employs diffusion
Correct Answer: symport
What type of transport uses two transport proteins?
Correct Answer: Symport
3
& 100% VERIFIED ANSWERS | LATEST
UPDATE | GRADED A+
How is osmosis different from simple diffusion?
Correct Answer: Water movement is driven by the concentration of solutes rather
than its own concentration.
Nonspecific permeases
Correct Answer: allow a variety of molecules to cross the cytoplasm membrane
What will happen to a cell that is placed in a solution containing a high concentration of
sugar, a molecule that cannot pass across the cell membrane?
Correct Answer: the cell will lose its interior water, causing it to shrivel up and
possibly die
How is simple diffusion different from other types of passive transport?
Correct Answer: Simple diffusion does not require a permease
Why is no energy required in passive transport?
1
,Correct Answer: The concentration gradient drives the movement
Once equilibrium is reached,
Correct Answer: molecules move, but there is no net movement in a particular
direction
Which of the following would not move freely across the cytoplasmic membrane?
Correct Answer: positively charged hydrogen ions
What makes phospholipid membranes good at keeping some molecules out and
allowing others to freely pass?
Correct Answer: They have both hydrophilic ad hydrophobic regions
Integral proteins are mostly involved in
Correct Answer: transport function
How does water enter and exit a cell?
Correct Answer: By simple diffusion or by use of an integral transport protein
A glycoprotein
Correct Answer: is a type of peripheral protein above that can be used as a receptor
or in enzymatic functions
2
, Molecules would be blocked by a cell membrane
Correct Answer: ions
Hydrophobic molecules would enter a cell
Correct Answer: through integral transport proteins
What is a hallmark of passive transport across a cell membrane?
Correct Answer: It occurs along an electrochemical gradient, and may involve the
use of transport proteins
A positively charged sodium ion
Correct Answer: would require the use of integral protein channels to pass through
a cell membrane
Active Transport
Correct Answer: -requires ATP
-requires the use of transport proteins
Active transport type that employs diffusion
Correct Answer: symport
What type of transport uses two transport proteins?
Correct Answer: Symport
3
