Cellular Transport Concepts and Mechanisms

What is the main characteristic of passive transport?

• It only occurs in plant cells.

• It does not require energy.

• It moves molecules from low to high concentration.

• It requires energy.

Which type of passive transport involves the help of a transport protein?

• Active transport

• Simple diffusion

• Facilitated diffusion

• Osmosis

In osmosis, water moves from an area of _____ concentration to an area of _____ concentration.

• low; high

• high; low

• low; low

• equal; equal

What happens to a cell in a hypotonic solution?

• It swells and may burst.

• It shrinks.

• It becomes isotonic.

• It stays the same size.

Which type of solution has an equal concentration of solute and water inside and outside the cell?

• Hypotonic

• Hypertonic

• Isotonic

• Dynamic

What is required for active transport to occur?

• Energy in the form of ATP

• Only water molecules

• No energy

• Equal concentration gradient

In active transport, molecules move from _____ concentration to _____ concentration.

• low; low

• equal; equal

• low; high

• high; low

Which of the following is an example of passive transport?

• Exocytosis

• Sodium-potassium pump

• Endocytosis

• Facilitated diffusion

What is the main difference between passive and active transport?

• Both do not require energy.

• Both require energy.

• Active transport requires energy, passive transport does not.

• Passive transport requires energy, active transport does not.

Which term describes the constant movement of molecules in isotonic solutions?

• Active motion

• Static equilibrium

• Dynamic equilibrium

• Passive motion