Fatty acid tails vary in length since each tail's identity does not depend on the other. These tails, even when in a phospholipid, retain their nonpolar character. Thus, their main form of interaction is via van der Waals forces.
Which of the following statements regarding the fatty acid tails of phospholipids is FALSE?
a) Phospholipids with unsaturated tails make the bilayer more fluid because the tails contain fewer hydrogen atoms and thus form fewer hydrogen bonds with each other.
b) Saturated phospholipid tails pack more tightly against each other than do unsaturated tails.
c) Most membrane phospholipids have one fully saturated tail.
d) Phospholipid tails in a membrane can interact with each other via van der Waals interactions.
e) Fatty acid tails vary in length.
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