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

 2. 
As a result of diffusion, the concentration of many types of substances
a.
always remains greater inside a membrane.
b.
becomes imbalanced on both sides of a membrane.
c.
eventually becomes balanced on both sides of a membrane.
d.
always remains greater outside of a membrane.
 

 3. 
The diffusion of water into or out of a cell is called
a.
osmosis.
c.
endocytosis.
b.
solubility.
d.
selective transport.
 

 4. 
Sugar molecules cross the cell membrane by
a.
gated channels.
c.
osmosis.
b.
facilitated diffusion.
d.
active transport.
 

 5. 
Which of the following is a form of active transport?
a.
osmosis
c.
sodium-potassium pump
b.
diffusion
d.
facilitated diffusion
 

 6. 
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)
 
 
bio4b_interv05_files/i0080000.jpg
 

 7. 
Refer to the illustration above. The process shown is called
a.
facilitated diffusion.
c.
active transport.
b.
osmosis.
d.
diffusion.
 

 8. 
A cell will swell when it is placed in a(n)
a.
isotonic solution.
c.
hypotonic solution.
b.
hypertonic solution.
d.
None of the above
 

 9. 
Which of the following does not require energy?
a.
active transport
c.
endocytosis
b.
sodium-potassium pump
d.
diffusion
 

 10. 
Which of the following transmit information into a cell by binding to signal molecules?
a.
channel proteins
c.
marker proteins
b.
end proteins
d.
receptor proteins
 

 11. 
Both active transport and facilitated diffusion involve
a.
ATP.
b.
movement against a concentration gradient.
c.
carrier proteins.
d.
All of the above
 

 12. 
When a signal molecule binds to a receptor protein, the receptor protein may
a.
cause the formation of a second messenger molecule.
b.
change the permeability of the membrane.
c.
catalyze certain chemical reactions in the cell.
d.
All of the above
 

 13. 
Molecules that are too large to be moved across a cell membrane can be removed from the cell by
a.
exocytosis.
c.
endocytosis.
b.
osmosis.
d.
diffusion.
 

 14. 
Proteins involved in facilitated diffusion are
a.
receptor proteins.
c.
Both (a) and (b)
b.
carrier proteins.
d.
None of the above
 

 15. 
Ridding the cell of materials by discharging the materials in vesicles is called
a.
endocytosis.
c.
diffusion.
b.
osmosis.
d.
exocytosis.
 

 16. 
Transport proteins that allow ions to pass through the cell membrane are called
a.
marker proteins.
c.
receptor proteins.
b.
ion channels.
d.
None of the above
 

 17. 
The interior portion of a cell membrane forms a nonpolar zone that
a.
allows food to pass through the membrane.
b.
allows polar molecules to pass through the membrane.
c.
prevents ions and most large molecules from passing through the membrane.
d.
None of the above
 

 18. 
Ion channel gates close the pores of some ion channels in response to
a.
stretching of the cell membrane.
b.
the binding of specific molecules to the channel.
c.
a change in electrical charge.
d.
All of the above
 

 19. 
The sodium-potassium pump usually pumps
a.
sodium ions into the cell.
b.
potassium ions out of the cell.
c.
potassium ions into the cell.
d.
only potassium ions and sugar molecules.
 

 20. 
Molecules that are too large to be moved through the membrane can be transported into the cell by
a.
osmosis.
c.
diffusion.
b.
endocytosis.
d.
exocytosis.
 

 21. 
Diffusion is the movement of a substance
a.
from an area of low concentration to an area of higher concentration.
b.
from an area of high concentration to an area of lower concentration.
c.
only in liquids.
d.
only through a lipid bilayer membrane.
 

 22. 
Signal molecules bind to
a.
receptor proteins.
c.
marker proteins.
b.
carbohydrates.
d.
transport proteins.
 

 23. 
Proteins that act like selective passageways in the cell membrane are known as
a.
marker proteins.
c.
channel proteins.
b.
receptor proteins.
d.
None of the above
 

 24. 
Osmosis is a type of
a.
endocytosis.
c.
active transport.
b.
facilitated diffusion.
d.
passive transport.
 

 25. 
The sodium-potassium pump
a.
uses passive transport.
c.
is located in the cytoplasm of a cell.
b.
is a carrier protein
d.
transports sugar molecules.
 



 
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