4/6/22, 9:56 AM Quiz: Membrane Transport and Cell Compartmentalization/Protein Sorting: MSCI660: Principles of Cellular Biology (D03)
( ) At least two signal sequences are required to direct proteins to
the mitochondrial matrix.
FTFT
TTTT
FFFF
FFTF
TFFT
Question 15 2..5 pts
In contrast to transporters, the channel proteins in cellular
membranes …
can only mediate passive transport.
interact strongly with the solute(s) that they transport.
undergo a conformational change every time they transport a
solute.
form pores that are always open.
Question 16 2..5 pts
https://canvas.liberty.edu/courses/193362/quizzes/1226834?module_item_id=24996703 11/34
, 4/6/22, 9:56 AM Quiz: Membrane Transport and Cell Compartmentalization/Protein Sorting: MSCI660: Principles of Cellular Biology (D03)
The Nernst equilibrium potential for an ion that is 10 times more
concentrated in the cytosol compared to the extracellular fluid is
about –60 mV. How much would the potential be if the
extracellular concentration decreases 100-fold with no change in
the intracellular concentration?
–6000 mV
–600 mV
–6 mV
–20 mV
–180 mV
Question 17 2..5 pts
Which of the following transporters mediates primary active
transport when transporting the solutes in the directions
indicated? The concentration of both solutes (shown as small
circles and squares) is higher outside of the cell.
C
E
D
A
https://canvas.liberty.edu/courses/193362/quizzes/1226834?module_item_id=24996703 12/34
( ) At least two signal sequences are required to direct proteins to
the mitochondrial matrix.
FTFT
TTTT
FFFF
FFTF
TFFT
Question 15 2..5 pts
In contrast to transporters, the channel proteins in cellular
membranes …
can only mediate passive transport.
interact strongly with the solute(s) that they transport.
undergo a conformational change every time they transport a
solute.
form pores that are always open.
Question 16 2..5 pts
https://canvas.liberty.edu/courses/193362/quizzes/1226834?module_item_id=24996703 11/34
, 4/6/22, 9:56 AM Quiz: Membrane Transport and Cell Compartmentalization/Protein Sorting: MSCI660: Principles of Cellular Biology (D03)
The Nernst equilibrium potential for an ion that is 10 times more
concentrated in the cytosol compared to the extracellular fluid is
about –60 mV. How much would the potential be if the
extracellular concentration decreases 100-fold with no change in
the intracellular concentration?
–6000 mV
–600 mV
–6 mV
–20 mV
–180 mV
Question 17 2..5 pts
Which of the following transporters mediates primary active
transport when transporting the solutes in the directions
indicated? The concentration of both solutes (shown as small
circles and squares) is higher outside of the cell.
C
E
D
A
https://canvas.liberty.edu/courses/193362/quizzes/1226834?module_item_id=24996703 12/34
