Unit 4

Multiple Choice

Which of the following types of cells do NOT have cell walls?

• Plant cells

• Fungi cells

• Animal cells

• Algae cells

Multiple Choice

What is the role of carbohydrate molecules attached to proteins in the cell membrane?

• They provide energy for the cell.

• They act as chemical identification cards.

• They transport water across the membrane.

• They form the lipid bilayer.

Multiple Choice

Which term describes a membrane that allows only certain substances to pass through it?

• Impermeable

• Permeable

• Selectively permeable

• Non-permeable

Fill in the Blanks

The concentration of a solution is defined as the mass of the

in a given volume of solvent.

Multiple Choice

Which of the following statements about diffusion are correct?

• Diffusion moves particles from low to high concentration.

• Diffusion requires energy from the cell.

• Diffusion moves particles from high to low concentration.

• Diffusion occurs only in solids.

Multiple Choice

Which of the following statements about passive transport is correct?

• It requires the cell to use energy.

• It moves substances from low to high concentration.

• It involves the movement of materials without using energy.

• It only occurs in plant cells.

Multiple Choice

Which of the following best describes osmosis?

• The movement of water molecules from low to high concentration through a membrane.

• The movement of water molecules from high to low concentration through a selectively permeable membrane.

• The movement of solute molecules from high to low concentration.

• The movement of any molecule through any membrane.

Multiple Choice

What type of transport requires energy?

• Diffusion

• Facilitated Diffusion

• Passive Transport

• Active Transport