Multiple Choice
Of the following movements a lipid can do in a membrane, which is the most rare?
8. Membrane Structure
The Lipid Bilayer
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Which of the following is not a form of lipid movement in the bilayer?
A
Traverse diffusion
B
Lateral diffusion
C
Flippase diffusion
D
Rotational diffusion
Verified step by step guidance1
Understand the different types of lipid movements within the lipid bilayer: lateral diffusion, rotational diffusion, and transverse diffusion (also known as flip-flop).
Lateral diffusion refers to the movement of lipids within the same layer of the bilayer, allowing them to move side-to-side.
Rotational diffusion involves the spinning of lipid molecules around their axis, which can occur within the bilayer.
Transverse diffusion, or flip-flop, is the movement of lipids from one leaflet of the bilayer to the other, which is a rare and energetically unfavorable process without the help of enzymes.
Recognize that 'Flippase diffusion' is not a standard term for lipid movement. Flippases are enzymes that facilitate transverse diffusion, but the term 'Flippase diffusion' itself is not a recognized form of lipid movement.
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