Cell Transport Quiz

What is the primary function of cholesterol in the cell membrane?

• To transport molecules across the membrane

• To increase membrane fluidity

• To provide structural support

• To facilitate cell signaling

Why is the cell membrane described as a 'fluid mosaic model'?

• Because it is impermeable to all substances

• Because it is composed of a single type of molecule

• Because it is rigid and unchanging

• Because it is made of various components that move fluidly

Which of the following best describes simple diffusion?

• Movement of water across a membrane

• Movement of molecules from high to low concentration without energy

• Movement of molecules using energy

• Movement of molecules from low to high concentration

What is osmosis?

• The diffusion of solutes across a membrane

• The active transport of molecules

• The diffusion of water across a semi-permeable membrane

• The movement of ions against a concentration gradient

What is the main difference between osmosis and simple diffusion?

• Osmosis involves the movement of solutes, while diffusion involves water

• Osmosis occurs only in plant cells

• Osmosis requires energy, while diffusion does not

• Osmosis involves water movement, while diffusion involves solutes

In an isotonic solution, how does water move in relation to the cell?

• Water moves into the cell only

• Water moves out of the cell only

• Water moves into and out of the cell at the same rate

• Water does not move at all

What happens to a cell in a hypotonic solution?

• The cell becomes rigid

• The cell remains the same size

• The cell swells and may burst

• The cell shrinks

Which type of solution causes a cell to lose water and shrivel?

• Isotonic

• Hypotonic

• Hypertonic

• Neutral

What is the term for the bursting of a cell in a hypotonic solution?

• Plasmolysis

• Diffusion

• Cytolysis

• Osmosis

How does a hypertonic solution affect a red blood cell?

• It has no effect on the cell

• It causes the cell to shrivel

• It causes the cell to swell

• It causes the cell to burst