Which of these molecules is correctly matched with its method of movement through the plasma membrane?
A) Lipid-soluble molecules - pass through membrane channels
B) Small, water-soluble molecules (ions) - dissolve in double phospholipid layer
C) Large, water-soluble molecules - transported by carrier-mediated processes
D) Glucose and amino acid molecules - pass through membrane channels
E) All of the choices are correctly paired.

Question

Quizplus · Accepted Answer

Large, water-soluble molecules typically cannot passively diffuse through the lipid bilayer of the plasma membrane due to their size and polarity. Instead, they are transported across the membrane through carrier-mediated processes, such as facilitated diffusion or active transport, which involve specific carrier proteins.

Which of These Molecules Is Correctly Matched with Its Method