Membrane lipids are capable of many different types of movement.Which of these does not occur spontaneously in biological membranes?

Question

Quizplus · Accepted Answer

Moving between lipid layers, also known as "flip-flop" movement, does not occur spontaneously in biological membranes due to the polar head groups of the lipids having to traverse the hydrophobic interior of the membrane. This process requires energy and is typically facilitated by specific enzymes known as flippases.

Membrane Lipids Are Capable of Many Different Types of Movement