Consider the following diagram of a membrane. Which of the following might be the portion of the membrane represented by the letter A?
A) choline
B) tristearin
C) oleic acid
D) glycerol

Question

Consider the following diagram of a membrane.  Which of the following might be the portion of the membrane represented by the letter A?
A) choline 
B) tristearin 
C) oleic acid 
D) glycerol

Quizplus · Accepted Answer

The portion of the membrane represented by A is likely to be the choline head group, as it is a common component of phospholipids and is typically found on the outer surface of the cell membrane. Tristearin is a type of fat molecule found in adipose tissue and is not typically a component of cell membranes. Oleic acid is a fatty acid commonly found in cell membranes, but it would not be represented by a single letter in this diagram. Glycerol is a component of some types of lipids, including phospholipids, but it is not typically represented by a single letter in diagrams of cell membranes.

Consider the Following Diagram of a Membrane