Molecules such as glucose and amino acids are NOT lipid soluble and therefore they
A)easily pass across the cell membrane.
B)require active transport to cross the cell membrane.
C)must be converted to lipids before they can enter a cell.
D)combine with carrier proteins and pass across by facilitated transport.
E)must be engulfed by a cell using endocytosis.

Question

Quizplus · Accepted Answer

Molecules that are not lipid soluble cannot easily pass through the cell membrane by simple diffusion. Instead, they require carrier proteins to transport them across the membrane by facilitated transport. Active transport is not always necessary for molecules that are not lipid soluble, and conversion to lipids or engulfment by endocytosis is not necessary or relevant for most small molecules like glucose and amino acids.

Molecules Such as Glucose and Amino Acids Are NOT Lipid