Choose all correct answers. The plasma membrane...

Question

Choose all correct answers:

The plasma membrane...

A.Contains Cholesterol molecules

B.Is formed of phospholipids; with polar and non-polar structures

C.Contains DNA molecules

D.Has two identical faces (identical molecular composition)

E.Contains more carbohydrates than protein

Answer 1

A. True. The plasma membrane of any animal cell has some cholesterol embedded within it to increase the membrane's stability.

B. True. The plasma membrqne is primarily constructed from phospholipids, which each contain a polar head and nonpolar tail.

C. False. The plasma membrane contains lipids, proteins, and carbohydrates, but no significant quantity of DNA.

D. False. The two sides of the plasma membrane are not identical; there are many peripheral proteins that attach to one side of the membrane and not the other.

E. False. Carbohydrates make up a very small percentage of the plasma membrane by mass, while proteins make up about half of it.