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Bio4B:  Cellular processes (Chapter 9)

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

 1. 
Water moves into a cell placed in a(n) _____ solution.
a.
osmotic
c.
hypotonic
b.
hypertonic
d.
isotonic
 

 2. 
If cells are placed in a strong sugar solution, water will _____.
a.
pass from the sugar solution to the cells
c.
stay in the cell
b.
pass from the cells to the sugar solution
d.
pass back and forth
 

 3. 
Because cells have a watery environment both inside and outside, the polar ends of the phospholipids in the plasma membrane form _____ layers.
a.
several
c.
double
b.
mosaic
d.
single
 

 4. 
Which of the following might be a result of a disease that causes a thickened plasma membrane?
a.
increased movement of molecules entering the cell
b.
decreased movement of molecules within the cell
c.
decreased movement of molecules entering the cell
d.
increased movement of molecules leaving the cell
 

 5. 
A cell's contents would be the same as its surroundings, were it not for _____.
a.
plasmolysis
c.
phagocytosis
b.
selective permeability
d.
dynamic equilibrium
 

 6. 
If it is not watered, a tulip plant wilts because it _____.
a.
increases active transport
c.
loses active transport
b.
increases turgor pressure
d.
loses turgor pressure
 

 7. 
If a cell is placed in salt water, water leaves the cell by _____.
a.
osmosis
c.
active transport
b.
diffusion
d.
phagocytosis
 

 8. 
Diffusion continues until there is no _____.
a.
dynamic equilibrium
c.
concentration gradient
b.
turgor pressure
d.
homeostasis
 

 9. 
A plasma membrane is made up of a(n) _____.
a.
cholesterol layer
c.
lipid bilayer
b.
enzyme bilayer
d.
protein layer
 

 10. 
Brownian motion is evidence of _____.
a.
polar ions
c.
chemical energy
b.
random motion of molecules
d.
microorganisms
 



 
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