Cell Transport Mechanisms Quiz

What is the primary difference between active and passive transport?

• Neither requires energy.

• Both require energy but in different forms.

• Passive transport requires energy, while active transport does not.

• Active transport requires energy, while passive transport does not.

What drives the movement of molecules in passive transport?

• External energy sources

• Kinetic energy of the molecules

• Cellular energy reserves

• Membrane proteins

How do molecules move during diffusion?

• From high to low concentration

• From low to high concentration

• Only within the cell

• Randomly without any direction

What prevents equilibrium from being established in living systems?

• Constant energy input

• Cell membrane and control systems

• Excessive molecule movement

• Lack of concentration gradient

What role do membrane proteins play in facilitated diffusion?

• They assist polar molecules in crossing the membrane.

• They repel polar molecules.

• They provide energy for diffusion.

• They block nonpolar molecules.

Which factor does NOT affect the rate of diffusion?

• Number of transport proteins

• Temperature and pressure

• Nature of the diffusing substance

• Color of the molecules

What is osmosis specifically concerned with?

• Movement of proteins

• Movement of solutes

• Movement of water molecules

• Movement of gases

How does water move in osmosis?

• Only into the cell

• Randomly across the membrane

• From low to high solute concentration

• From high to low solute concentration

What happens to a cell in a hypertonic solution?

• It remains unchanged.

• It gains solutes.

• It swells and may burst.

• It shrinks as it loses water.

In isotonic conditions, what is the state of water movement?

• Water does not move at all.

• Water moves only out of the cell.

• Water movement is balanced.

• Water moves only into the cell.