1. Osmosis requires _____.
a. semipermeable membrane and concentration gradient
b. semipermeable membrane and water potential
c. energy production and semipermeable membrane
d. concentration gradient and water potential
2. Phagocytosis _____, pinocytosis _____.
a. cell drinking, cell eating
b. cell invagination, cell drinking
c. cell eating, cell drinking
d. cell drinking, cell
3. Which of the following has a very high permeability?
a. urea
b. polar molecules
c. water
d. ethanol
4. Which of the following components is the reason why bilipid layers do not stick with each other?
a. cytoskeleton
b. proteins
c. cholesterol
d. protein channel
5. The following are functions of cell membrane except _____.
a. serves as production for biological molecules
b. serves as the barricade from other cells
c. regulates the entry and exit of substances
d. protects internal parts of the cell