Cell Membrane Structure

Front

What macromolecule makes up the majority of cell membranes?

Back

Lipids

Front

What type of lipid is shown?

Back

Phospholipid

Front

Hydrophobic

Back

Dislikes water

Front

Hydrophilic

Back

Likes water

Front

True or False: The phospholipid bilayer forms with the hydrophobic heads facing outwards and the hydrophilic tails facing inwards

Back

False

Front

True or False: Because the inner region of the cell membrane is non-polar, any non-polar molecules can pass through the membrane.

Back

True

Front

True or False: All molecules that have a charge or are too large cannot pass through the cell membrane easily

Back

True

Front

Selectively permeable

Back

Allows some, but not all molecules to cross

Front

The image represents the fluid mosaic model. Which of the following best describes the fluid mosaic model?

Back

Cell membrane components are able to float and move throughout the membrane surface

Front

Why can cholesterol exist in the middle of cell membrane bilayer?

Back

Cholesterol is a lipid, which means it's nonpolar. This allows it to pass through since the tails of phospholipids are also nonpolar.