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BIOL 103 CELL MEMBRANE QUIZ

BIOL 103 CELL MEMBRANE QUIZ

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Author: Joyce Buda
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Cell Membrane Quiz
Score: 100%
Points: 80 out of 80
Question 1
Points: 10 out of 10
Which component of the plasma membrane has the widest variety of functions?
phospholipids
sterols
proteins
carbohydrates
Question 2
Points: 10 out of 10
Biological Membranes are:
symmetrical.
impermeable.
dynamic.
static.
Question 3
Points: 10 out of 10
Which of the following can cross the cell’s plasma membrane without the assistance of protein transporters? Select all that apply.
 
large polar molecules
positively charged ions
small hydrophobic molecules
gasses
Question 4
Points: 10 out of 10
What is the role of carbohydrates in the plasma membrane?
transport materials across the membrane
cellular identification
adhesion
help maintain fluidity
Question 5
Points: 10 out of 10
Which substance would be most likely to pass through a lipid bilayer/plasma membrane without embedded proteins?
a large fatty acid
a sodium ion
water
a steroid hormone
a large peptide hormone
Question 6
Points: 10 out of 10
A set of erythrocytes is placed in a beaker of 0.9% NaCl. Nothing appears to happen to the cells. Why?
Sodium blocks the movement of water.
water has not moved at all.
0.9% NaCl is hypotonic to the cells.
0.9% NaCl is hypertonic to the cells.
0.9% NaCl is iostonic to the cells.
Question 7
Points: 10 out of 10
How does the selective permeability of the membrane help the cell.
This allows the cell to maintain the proper shape.
This allows the cell to regulate what enters and exits
This allows the cell to maintain a constant temperature.
All of these
Question 8
Points: 10 out of 10
All of the following have an effect on the fluidity of a membraneexcept:
the presence of integral proteins in the membrane
interactions among fatty acids in the core of the bilayer
the ratio of saturated to unsaturated fatty acids
the cholesterol content


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