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Name ______________________________ Class ___________________ Date __________________
Assessment
CH8.1 Quiz
Section: Cell Membrane
In the space provided, write the letter of the description that best matches each term.
_____ 1. cell membrane
_____ 2. phospholipid
_____ 3. lipid bilayer
_____ 4. homeostasis
_____ 5. membrane protein
a. a boundary that encloses the cell,
separating it from its surroundings
b. the maintenance of stable internal
conditions in a changing environment
c. a lipid made of a phosphate group and two
fatty acids
d. substance made of amino acids and that is
held in place among the lipids
e. a double layer of phospholipids that is the
foundation of a biological membrane
In the space provided, write the letter of the term or phrase that best answers each
question.
_____ 6. How does a cell membrane aid the cell in maintaining homeostasis?
a. by changing the internal environment
b. by changing the external environment
c. by controlling what goes in and out of the cell
d. by providing structural support for the cell
_____ 7. Which kinds of substances cannot pass through the cell membrane and
why?
a. polar molecules because the inside of the membrane is nonpolar
b. nonpolar molecules because the inside of the membrane is polar
c. polar molecules because the inside of the membrane is polar
d. nonpolar molecules because inside of the membrane is nonpolar
_____ 8. Which membrane protein enables cells to sense their surroundings?
a. cell-surface marker
c. enzyme
b. receptor protein
d. transfer protein
_____ 9. Which membrane protein allows other cells to identify a cell?
a. cell-surface marker
c. enzyme
b. receptor protein
d. transfer protein
_____ 10. Which membrane protein carries substances across the cell membrane?
a. cell-surface marker
c. enzyme
b. receptor protein
d. transport protein
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Biology
25
Cells and Their Environment
Name ______________________________ Class ___________________ Date __________________
Assessment
CH8.2 Quiz
Section: Cell Transport
In the space provided, write the letter of the description that best matches each term.
_____ 1. osmosis
_____ 2. carrier protein
_____ 3. equilibrium
_____ 4. sodium-potassium
pump
_____ 5. concentration
gradient
_____ 6. diffusion
a. state that exists when the concentration of a
substance is the same throughout a space
b. movement of particles from a region of
higher concentration to a region of lower
concentration
c. substance made of amino acids that moves
substances across a cell membrane
d. substance that requires energy to transport
sodium ions and potassium ions across a cell
membrane
e. movement of water across a selectively
permeable membrane from a region of
higher concentration to a region of lower
concentration
f. difference in concentration of a substance
across a distance
In the space provided, write the letter of the response that best answers each question.
_____ 7. What is the difference between active transport and passive transport?
a. Active transport requires energy, and passive transport does not.
b. Active transport requires carrier proteins, and passive transport does
not.
c. Active transport moves substances down their concentration
gradient, and passive transport does not.
d. Both (a) and (c)
_____ 8. Why is osmosis important?
a. to transport proteins across the cell membrane
b. to aid the movement of large substances in and out of a cell
c. to maintain the water balance in a cell
d. All of the above
_____ 9. Which substances pass directly through the cell membrane?
a. small, polar molecules
c. sugars
b. small, nonpolar molecules
d. amino acids
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Biology
26
Cells and Their Environment
Name ______________________________ Class ___________________ Date __________________
Assessment
CH8.3 Quiz
Section: Cell Communication
In the space provided, write the letter of the description that best matches each term.
_____ 1. signal
_____ 2. receptor protein
_____ 3. second messenger
a. a substance formed of amino acids that binds
with a specific molecule, causing the cell in
which the substance is found to respond
b. a molecule that is generated when a specific
substance attaches to a receptor on a cell
membrane and that causes changes within the
cell
c. anything that carries information between cells
In the space provided, write the letter of the response that best answers each question.
_____ 4. What does a signaling cell do to aid communication among cells?
a. It creates a receptor protein on its cell membrane.
b. It produces a molecule that a target cell can detect.
c. It sends a second messenger to neighboring cells.
d. All of the above
_____ 5. How does a cell recognize only the signals meant for it?
a. It has receptor proteins that respond to light and sound.
b. It has receptor proteins in the cytoplasm that respond to touch.
c. It has receptor proteins of specific shapes that certain molecules fit in.
d. It has receptor proteins that repel certain signal molecules.
_____ 6. How might a cell membrane change in response to a signal?
a. Transport proteins might open or close.
b. Transport proteins might be assembled in the cell membrane.
c. Transport proteins might leave the cell membrane.
d. Transport proteins might be converted to carrier proteins.
_____ 7. How can a signal trigger a specific chemical reaction in a target cell?
a. by bombarding the cell with a variety of messages
b. by detaching from a molecule in the cell membrane
c. by reducing the permeability of the cell membrane
d. by activating an enzyme in the cell membrane
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Biology
27
Cells and Their Environment