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Bio 4B: Investigate and Identify Cellular Processes (Ch. 4-HOLT)

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

 1. 
As a result of diffusion, the concentration of many types of substances
a.
always remains greater inside a membrane.
b.
eventually becomes balanced on both sides of a membrane.
c.
always remains greater outside of a membrane.
d.
becomes imbalanced on both sides of a membrane.
 
 
bio4b_interv02_files/i0030000.jpg
 

 2. 
Refer to the illustration above. The process shown is called
a.
osmosis.
c.
active transport.
b.
facilitated diffusion.
d.
diffusion.
 

 3. 
Diffusion is the movement of a substance
a.
only through a lipid bilayer membrane.
b.
from an area of low concentration to an area of higher concentration.
c.
only in liquids.
d.
from an area of high concentration to an area of lower concentration.
 

 4. 
The dispersal of ink in a beaker of water is an example of
a.
diffusion.
c.
active transport.
b.
osmosis.
d.
endocytosis.
 

 5. 
The diffusion of water into or out of a cell is called
a.
solubility.
c.
selective transport.
b.
osmosis.
d.
endocytosis.
 

 6. 
Osmosis is a type of
a.
active transport.
c.
facilitated diffusion.
b.
passive transport.
d.
endocytosis.
 

 7. 
A cell will swell when it is placed in a(n)
a.
hypotonic solution.
c.
isotonic solution.
b.
hypertonic solution.
d.
None of the above
 

 8. 
The interior portion of a cell membrane forms a nonpolar zone that
a.
allows polar molecules to pass through the membrane.
b.
allows food to pass through the membrane.
c.
prevents ions and most large molecules from passing through the membrane.
d.
None of the above
 

 9. 
Ions move through ion channels by
a.
endocytosis.
c.
passive transport.
b.
diffusion.
d.
active transport.
 

 10. 
Proteins that act like selective passageways in the cell membrane are known as
a.
marker proteins.
c.
receptor proteins.
b.
channel proteins.
d.
None of the above
 

 11. 
Transport proteins that allow ions to pass through the cell membrane are called
a.
receptor proteins.
c.
ion channels.
b.
marker proteins.
d.
None of the above
 

 12. 
Proteins involved in facilitated diffusion are
a.
carrier proteins.
c.
Both (a) and (b)
b.
receptor proteins.
d.
None of the above
 

 13. 
Sugar molecules can enter cells through the process of
a.
exocytosis.
c.
osmosis.
b.
facilitated diffusion.
d.
ion pumps.
 

 14. 
Which of the following does not require energy?
a.
diffusion
c.
active transport
b.
endocytosis
d.
sodium-potassium pump
 

 15. 
Unlike passive transport, active transport
a.
requires energy.
b.
moves substances down their concentration gradient.
c.
does not involve carrier proteins.
d.
All of the above
 

 16. 
Which of the following is a form of active transport?
a.
osmosis
c.
facilitated diffusion
b.
diffusion
d.
sodium-potassium pump
 

 17. 
The sodium-potassium pump
a.
is a carrier protein
c.
is located in the cytoplasm of a cell.
b.
uses passive transport.
d.
transports sugar molecules.
 

 18. 
The sodium-potassium pump usually pumps
a.
potassium ions out of the cell.
b.
sodium ions into the cell.
c.
potassium ions into the cell.
d.
only potassium ions and sugar molecules.
 

 19. 
The sodium-potassium pump
a.
increases the concentration of sodium ions inside a cell.
b.
decreases the concentration of sodium ions inside a cell.
c.
increases the concentration of potassium ions inside a cell.
d.
Both (b) and (c)
 

 20. 
Proteins and polysaccharides that are too large to move into a cell through diffusion or active transport move in by
a.
exocytosis.
c.
the sodium-potassium pump.
b.
endocytosis.
d.
None of the above
 

 21. 
Molecules that are too large to be moved across a cell membrane can be removed from the cell by
a.
diffusion.
c.
endocytosis.
b.
exocytosis.
d.
osmosis.
 
 
bio4b_interv02_files/i0240000.jpg
 

 22. 
Refer to the illustration above. What happens when the structure labeled A binds to the structure labeled B?
a.
Information is sent into the cell.
c.
The cell begins to undergo mitosis.
b.
Proteins enter the cell.
d.
None of the above
 

 23. 
Signal molecules bind to
a.
carbohydrates.
c.
receptor proteins.
b.
marker proteins.
d.
transport proteins.
 

 24. 
When a signal molecule binds to a receptor protein, the receptor protein may
a.
change the permeability of the membrane.
b.
cause the formation of a second messenger molecule.
c.
catalyze certain chemical reactions in the cell.
d.
All of the above
 

 25. 
Which of the following transmit information into a cell by binding to signal molecules?
a.
channel proteins
c.
marker proteins
b.
receptor proteins
d.
end proteins
 



 
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