Revision - Plasma Membrane

The fatty acid tails of the phospholipid is:

• Polar & Hydrophobic

• Polar & Hydrophilic

• Non-Polar & Hydrophobic

• Non-Polar & Hydrophobic

Draw a phospholipid bilayer. Label the phospholipid's structures and indicate whether they are hydrophilic or hydrophobic.

Draw a flow chart to illustrate simple diffusion.

Explain how a phospholipid bilayer will allow some molecules to pass through via diffusion, whilst preventing others from doing so.

Would a highly charged molecule that is small enough to fit through the phospholipid bilayer be able to pass through via simple diffusion? Explain.

A solution is hypertonic to a cell's interior. The external solution will have:

• a higher solute concentration than the cell

• a lower solute concentration than the cell

• equal solute concentration to the cell

Which of the following requires ATP?

• Diffusion

• Osmosis

• Facilitated Diffusion

• Exocytosis

Explain how a cell would transport a produced protein to another cell.