Quiz Questions Cell Membrane Structure Activity
_____ 1. What is the outer boundary of an animal cell?
a. Cell wall
b. Plasma membrane
c. Nuclear membrane
d. Endoplasmic reticulum
e. Nucleolus
_____ 2. Which of the following is NOT a characteristic of a plant plasma membrane?
a. Maintains homeostasis
b. Regulates passage of molecules into and out of cell
c. Protects and supports
d. Contains cholesterol
e. Can create compartments within cell
_____ 3. Which of the following describes the fluid mosaic model of the plasma
membrane structure?
a. Phospholipid monolayer with embedded proteins
b. Phospholipid bilayer with embedded proteins
c. Phospholipid tri-layer with embedded proteins
d. Triglyceride bilayer with embedded proteins
e. Triglyceride monolayer with embedded proteins
_____ 4. Which of the following statements is NOT correct regarding the plasma
membrane structure?
a. Protein molecules may be partially embedded, wholly embedded or lie on
the surface of membrane.
b. Protein molecules are localized toward one side of the cell membrane
(outer or inner side).
c. Phospholipids form a bilayer
d. Phospholipids have a fluid consistency
e. The head of a phospholipid molecule is attracted to water.
_____ 5. Which of the following statements is NOT correct about the phospholipid
molecules in the plasma membrane?
a. Each phospholipid molecule has four nonpolar tails
b. Each phospholipid molecule has one polar head
c. The phospholipid head is attracted to water
d. The phospholipid tails are not attracted to water
e. The phospholipid heads face outward
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_____ 6. . Which of the following statements is NOT correct about the phospholipid
molecules in the plasma membrane?
a. The polar heads face outward
b. The nonpolar tails face inward
c. The polar heads are hydrophobic
d. The nonpolar tails are hydrophobic
e. The phospholipids form a bilayer
_____ 7. Which of the following molecules would NOT be found in an animal plasma
membrane?
a. Proteins
b. Phospholipids
c. Glycoproteins
d. Cholesterol
e. Nucleic acids
_____ 8. The various functions of the plasma membrane are largely determined by the
plasma membrane proteins.
a. True
b. False
_____ 9. The phospholipid bilayer has a solid consistency.
a. True
b. False
_____ 10. The basic structure of the plasma membrane is determined by the proteins
present.
a. True
b. False
_____ 11. Phospholipids have hydrophilic and hydrophobic regions.
a. True
b. False
____ 12. Which type of protein in the plasma membrane has carbohydrate attached to
it so that cells can be distinguished from each other?
a. Pore protein
b. Channel protein
c. Enzyme
d. Recognition protein
e. Receptor protein
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_____ 13. If a particular protein was identified in the plasma membrane to cause
organ transplant rejection, such a protein would be considered a (an) ___________
protein.
a. Channel
b. Pore
c. Recognition
d. Receptor
e. Enzyme
______ 14. A _________________ protein allows a particular polar molecule or ion to pass
freely across the plasma membrane:
a. Recognition
b. Channel
c. Receptor
d. Enzyme
_____ 15. A hormone such as insulin acts by attaching to _________ proteins in the
plasma membrane and increasing the glucose carriers present.
a. Receptor
b. Enzymatic
c. Channel
d. Pore
e. Recognition
_____ 16. Pygmies are short because:
a. They do not produce enough growth hormone
b. They produce too much growth hormone
c. Their plasma membrane growth hormone channel proteins cannot
interact with the hormone
d. Their plasma membrane growth hormone pore proteins cannot interact
with the hormone
e. Their plasma membrane growth hormone receptor proteins cannot
interact with the hormone.
_____ 17. A (an) __________________ in the plasma membrane carries out metabolic
reactions.
a. Receptor
b. Recognition
c. Enzymatic
d. Pore
e. Channel
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_____ 18. Which statement best describes the plasma membrane?
a. It is freely permeable to all substances
b. It is selectively permeable to certain substances
c. It is non-permeable to all substances
_____ 19. Which of the following statements is NOT correct about the plasma
membrane?
a. Small non-charged molecules easily cross the membrane
b. Lipid molecules have little difficulty in crossing the plasma membrane
c. Charged molecules and ions readily move from inside the cell to outside
the cell
d. Carbon dioxide easily passes through the plasma membrane
e. Oxygen easily passes through the plasma membrane
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