Q: What helps the plasma membrane keep its shape?


Read this paragraph and choose the correct option from the provided answers:

The plasma membrane also contains other molecules, primarily other lipids and proteins. The green molecules in Figure above , for example, are the lipid cholesterol. Molecules of cholesterol help the plasma membrane keep its shape. Many of the proteins in the plasma membrane assist other substances in crossing the membrane.

 Choices:

- molecules of carbohydrates

- molecules of oxygen

- cytoplasm

- molecules of cholesterol


A:
molecules of cholesterol