4/6/22, 9:57 AM Quiz: Membrane Transport and Cell Compartmentalization/Protein Sorting: MSCI660: Principles of Cellular Biology (D03)
Considering the following hydropathy plot for a multipass
transmembrane protein in the plasma membrane, are the protein
termini expected to be located inside (I) or outside (O) of the cell?
Which of the regions indicated as 2 and 3 in the plot is expected to
have more positively charged residues? The position of positively
charged residues near the first transmembrane helix is indicated
by an asterisk on the plot.
I; 3
O; 3
I; 2
O; 2
2..5 pts
Question 31
Consider a human cell such as a hepatocyte. Which of the
following compartments occupies a larger volume in the cell?
Mitochondria
Endoplasmic reticulum
Cytosol
https://canvas.liberty.edu/courses/193362/quizzes/1226834?module_item_id=24996703 21/34
, 4/6/22, 9:57 AM Quiz: Membrane Transport and Cell Compartmentalization/Protein Sorting: MSCI660: Principles of Cellular Biology (D03)
Peroxisomes
Nucleus
Question 32 2..5 pts
Compared to the cytosol, which of the following is generally true
about the lumen of the endoplasmic reticulum in our cells?
It has a much higher calcium ion concentration.
It has a more reducing environment.
It has a higher pH.
It has a higher density of ribosomes.
All of the above.
Question 33 2..5 pts
Why do cells not have membrane transport proteins for O2?
Because oxygen can dissolve in water and leak in via water
channels.
Because oxygen transport across a membrane is energetically
unfavorable.
https://canvas.liberty.edu/courses/193362/quizzes/1226834?module_item_id=24996703 22/34
Considering the following hydropathy plot for a multipass
transmembrane protein in the plasma membrane, are the protein
termini expected to be located inside (I) or outside (O) of the cell?
Which of the regions indicated as 2 and 3 in the plot is expected to
have more positively charged residues? The position of positively
charged residues near the first transmembrane helix is indicated
by an asterisk on the plot.
I; 3
O; 3
I; 2
O; 2
2..5 pts
Question 31
Consider a human cell such as a hepatocyte. Which of the
following compartments occupies a larger volume in the cell?
Mitochondria
Endoplasmic reticulum
Cytosol
https://canvas.liberty.edu/courses/193362/quizzes/1226834?module_item_id=24996703 21/34
, 4/6/22, 9:57 AM Quiz: Membrane Transport and Cell Compartmentalization/Protein Sorting: MSCI660: Principles of Cellular Biology (D03)
Peroxisomes
Nucleus
Question 32 2..5 pts
Compared to the cytosol, which of the following is generally true
about the lumen of the endoplasmic reticulum in our cells?
It has a much higher calcium ion concentration.
It has a more reducing environment.
It has a higher pH.
It has a higher density of ribosomes.
All of the above.
Question 33 2..5 pts
Why do cells not have membrane transport proteins for O2?
Because oxygen can dissolve in water and leak in via water
channels.
Because oxygen transport across a membrane is energetically
unfavorable.
https://canvas.liberty.edu/courses/193362/quizzes/1226834?module_item_id=24996703 22/34
