Chapter 5 Quiz (Take home) – Cell Transport
1. The cell membrane is composed of a _____________ bilayer.
a. Phospholipid
b. Protein
c. Carbohydrate
d. Hydrophobic
2. What type of cells have cholesterol in their cell membranes?
a. Bacteria
b. Plant
c. Animal
d. Fungi
3. Cell membranes have structures that help other cells recognize them. These structures are called
a. Channel proteins
b. Carbohydrate chains
c. Pore proteins
d. Cholesterol
4. Which list contains the organic compounds found in cell membranes?
a. Carbohydrates, lipids, and nucleic acids
b. Lipids, proteins, and carbohydrates
c. Proteins, nucleic acids and lipids
d. Carbohydrates, proteins, and nucleic acids
5. What does it mean to be hydrophobic?
a. Dislike water
c. Like water
b. Dislike hydrogen
d. Like hydrogen
6. What type of fatty acid is full of hydrogen?
a. Unsaturated
c. Phosopholipid
b. Saturated
d. Hydrogenated
7. Which statement best describes the movement of phospholipids within the membrane?
a. Phospholipids are in constant motion
b. Phospholipids move laterally (horizontally) with ease
c. Phospholipids rarely ‘flip-flop’
d. All the answers are correct
8. Your lungs are constantly exchanging oxygen and carbon dioxide between your body cells and your blood
cells by diffusion. As you exercise intensely, your body temperature increases slightly. How does this affect the
process of diffusion?
a. The rate of diffusion increases due to your slightly higher body temperature.
b. The rate of diffusion decreases due to your slightly higher body temperature.
c. The rate of diffusion is unaffected by changes in temperature.
d. Diffusion stops completely during periods of over-exertion.
9. Which state best describes molecules?
a. Molecules are in constant motion.
c. Molecules rarely move.
b. Molecules move when heated.
d. Molecules always move in the same direction.
10. Molecules will continue to diffuse across a membrane
a. Until they reach equilibrium
b. Forever
c. Until all of the molecules are on the other side d. None of the answers are correct
11. When a solution has reached equilibrium what happens to the particles
a. They continue to move from an area of high to an area of low concentration
b. They continue to move, just randomly
c. They begin to move from an area of low to an area of high concentration
d. All of the answers are correct
12. What does it mean to be selectively permeable?
a. to allow only certain molecules to pass through a membrane
b. to allow all molecules to pass through a membrane
c. to allow no molecules to pass through a membrane
d. None of the answers are correct
13. What happens to animal cells when they are placed in a hypotonic solution?
a. cytolysis
b. crenate
c. plasmolysis
d. turgor pressure
14. A normal plant cell holds water in the vacuole of the cell. This large organ also gives the cell support.
Suppose a plant is submerged in salt water. As a result, the vacuoles collapse and the leaves wilt. This condition
is called plasmolysis. Which explanation do you think best describes what happens to the cells of that plant
during plasmolysis?
a. The water diffuses into the cell to equalize the solute concentrations.
b. The solute (salt) moves inside the cell to equalize the solute concentrations.
c. The water diffuses out of the cell to equalize the solute concentrations.
d. The solute (salt) pushes on the vacuole of the plant cell causing it to collapse.
15. Which statement best describes passive transport?
a. The movement of particles from an area of low to an area of high concentration without the use of energy.
b. The movement of particles from an area of high to an area of low concentration with the use of energy.
c. The movement of particles from an area of low to an area of high concentration with the use of energy.
d. The movement of particles from an area of high to an area of low concentration without the use of energy.
16. Which of the following lists contains ONLY examples of passive transport?
a. Osmosis, diffusion, facilitated diffusion
b. Osmosis, endocytosis, facilitated diffusion
c. Diffusion, exocytosis, osmosis
d. Facilitated diffusion, pinocytosis, phagocytosis
17. What is the difference between diffusion and facilitated diffusion?
a. Diffusion occurs without the help of proteins.
b. Facilitated diffusion occurs without the help of proteins
c. Diffusion is an example of passive transport while facilitated diffusion is an example of active transport
d. None of the answers are correct.
18. What is the difference between active and passive transport?
a. Active transport requires energy and moves particles from an area of low to high concentration.
b. Active transport does not require energy.
c. Active transport moves particles from an area of high to an area of low concentration.
d. Active transport does not require energy and moves particles from an area of low to high concentration.
19. What is a pump?
a. A protein that moves particles with the concentration gradient.
b. A form of passive transport.
c. A protein that moves particles against the concentration gradient.
d. None of the answers are correct.
20. What does the sodium potassium pump move out of the cell?
a. Sodium
b. Potassium
c. Hydrogen
d. Oxygen