Unit 8 Exam Review Quiz

All of the following describe the process of osmosis EXCEPT

• the movement of water that does not require energy.

• water flowing from a high to low concentration of water.

• water flowing from a hypotonic to a hypertonic solution.

• the movement of water that requires energy.

When a membrane is selectively permeable, the membrane

• allows all materials through.

• is made of phospholipids, proteins, and carbohydrates.

• is required for processes like binary fission.

• only allows certain molecules to pass through it.

Which of the following correctly defines diffusion?

• the movement of molecules from high to low concentration without the input of energy.

• the movement of molecules from low to high concentration without the input of energy.

• the movement of molecules from high to low concentration with the input of the energy.

• the movement of molecules from low to high concentration with the input of energy.

Which of the following correctly defines active transport?

• the movement of molecules from high to low concentration without the input of energy.

• the movement of molecules from low to high concentration without the input of energy.

• the movement of molecules from high to low concentration with the input of the energy.

• the movement of molecules from low to high concentration with the input of energy.

Based on the diagram, which answer choice correctly identifies the two types of solutions?

• Cell = isotonic; Solution = isotonic

• Cell = hypotonic; Solution = hypertonic

• Cell = hypertonic; Solution = hypotonic

• Cell = isotonic; Solution = hypertonic

Which of the following molecules is a temporary storage for chemical energy used by the cell to energize cellular processes?

• glucose

• lipids

• polysaccharides

• ATP

Which of the following scenarios would be considered passive transport?

• the movement of salt ions from a high concentration outside the cell to a low concentration inside the cell through a protein channel

• the movement of carbon dioxide from a high concentration inside the cell to a low concentration outside the cell

• the movement of sodium ions from a low concentration inside the cell to a high concentration outside the cell

• the movement of water from a hypotonic to a hypertonic environment.

Both simple diffusion and facilitated diffusion are passive transport mechanisms in which molecules move from a high to a low concentration (or down the concentration gradient). What is the difference between these two processes?

• Simple diffusion requires energy whereas facilitated does not.

• Facilitated diffusion requires energy whereas simple diffusion does not.

• Facilitated diffusion requires a protein to allow molecules to pass through the cell membrane.

• None of these choices are correct.

Based on the diagram here, which of the following statements accurately describes the behavior?

• Solute molecules will move to the right.

• Water molecules will move to the right.

• Water molecules will move to the left.

• None of these are correct.

Which of the following terms describes an active transport process that moves a large number of molecules into the cell?

• facilitated diffusion

• osmosis

• endocytosis

• exocytosis