Which of the following statements about lipids within a membrane is false?
a. They rotate rapidly around their long axes.
b. Enzymes called flippases generate membrane asymmetry.
c. They flip-flop readily from one monolayer to the other.
d. They rapidly exchange positions with one another within the plane of the membrane.
The correct answer will be:-
(c) They flip-flop readily from one monolayer to the other.
It is the false statement as flip-flop movement is intrinsically very slow. As they have polar regions so free-energy barriers to flip flop movement is larger.
So, lipid cannot readily flip flop from one monolayer to the other.
The other statements are true as :-
So all the statements are true except (c).
Thus (c) is the correct answer.
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