Question

question 1 of 15
the following figure shows a typical phospholipid. suppose this molecule was incorporated into a cell membrane. which letter indicates the portion of the molecule that would be exposed to the aqueous environment?
a. c
b. a
c. d
d. b

Explanation:

Phospholipids have a hydrophilic (water - loving) head and hydrophobic (water - fearing) tails. The head region, which contains charged and polar groups, is exposed to the aqueous environment. In the given phospholipid structure, the region labeled A contains a charged nitrogen group and a phosphate group, making it hydrophilic. The regions labeled B, C, and D are long hydrocarbon chains which are non - polar and hydrophobic.

Answer:

B. A