BIOL 2160 CROUSILLAC EXAM 2
(PRACTICE QUESTIONS) QUESTIONS AND
ANSWERS 100% PASS 2026 EDITION
Which of the following would the plasma membrane NOT be permeable to?
a. steroids
b. oxygen
c. glucose
d. urea - ANS c. glucose
Why?
The lipid bilayer portion of the plasma membrane is highly permeable to nonpolar molecules;
moderately permeable to small, uncharged polar molecules; and impermeable to ions and
large, uncharged polar molecules.
Which of the following is usually at a higher concentration in the cytosol compared to the
extracellular fluid?
a. Potassium
b. Oxygen
c. Sodium
@COPYRIGHT 2026 ALLRIGHTS RESERVED 1
, d. positively charged ions - ANS a. potassium
True/False: The electrochemical gradient determines what direction many solutes will tend to
move when they are allowed to cross the membrane. - ANS True
Active processes require the cell to expend _____? - ANS ATP/Energy
Which of the following would NOT increase the rate of diffusion?
a. increase the concentration gradient
b. increase the temperature
c. increase the surface area
d. increase the mass of the particles - ANS d. increase the mass of the particles
Which of the following is the source of energy for secondary active transport?
a. ATP
b. glucose
c. the electrochemical gradient
d. the electron transport system - ANS c. the electrochemical gradient
This is an example of a transport mechanism that acts as an active transport mechanism and an
enzyme.
a. sodium potassium pump
@COPYRIGHT 2026 ALLRIGHTS RESERVED 2
(PRACTICE QUESTIONS) QUESTIONS AND
ANSWERS 100% PASS 2026 EDITION
Which of the following would the plasma membrane NOT be permeable to?
a. steroids
b. oxygen
c. glucose
d. urea - ANS c. glucose
Why?
The lipid bilayer portion of the plasma membrane is highly permeable to nonpolar molecules;
moderately permeable to small, uncharged polar molecules; and impermeable to ions and
large, uncharged polar molecules.
Which of the following is usually at a higher concentration in the cytosol compared to the
extracellular fluid?
a. Potassium
b. Oxygen
c. Sodium
@COPYRIGHT 2026 ALLRIGHTS RESERVED 1
, d. positively charged ions - ANS a. potassium
True/False: The electrochemical gradient determines what direction many solutes will tend to
move when they are allowed to cross the membrane. - ANS True
Active processes require the cell to expend _____? - ANS ATP/Energy
Which of the following would NOT increase the rate of diffusion?
a. increase the concentration gradient
b. increase the temperature
c. increase the surface area
d. increase the mass of the particles - ANS d. increase the mass of the particles
Which of the following is the source of energy for secondary active transport?
a. ATP
b. glucose
c. the electrochemical gradient
d. the electron transport system - ANS c. the electrochemical gradient
This is an example of a transport mechanism that acts as an active transport mechanism and an
enzyme.
a. sodium potassium pump
@COPYRIGHT 2026 ALLRIGHTS RESERVED 2
