Which of the following statements regarding cellular membranes is false?
A) The hydrophobic nature of the phospholipid tails limits the migration of polar molecules across the membrane.
B) Integral proteins and phospholipids move fluidly throughout the membrane.
C) Membrane phospholipids flip back and forth from one side of the bilayer to the other.
D) Glycolipids and glycoproteins serve as recognition sites on the cell membrane.
E) All of the above are true.

Question

Quizplus · Accepted Answer

Membrane phospholipids do not flip back and forth from one side of the bilayer to the other. This process requires energy and specific enzymes (flippases), which are typically only found in certain membrane compartments or specialized cell types. The majority of phospholipids remain oriented in their starting position throughout the lifespan of the cell membrane.

Which of the Following Statements Regarding Cellular Membranes Is False