Refer to the figure. Which of the following is true regarding the labeled plasma membrane? 
A) Parts X and Z are hydrophobic.
B) Parts W and Z are hydrophilic.
C) Parts X and Y are hydrophilic.
D) Parts W and Y are hydrophobic.
E) Parts W and X are hydrophilic. The hydrophilic polar head portion of a phospholipid is found on the outside margins closest to water exposure. The hydrophobic nonpolar tail portions are found on the inside of the membrane as far from water as possible.
Correct Answer:
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