The plasma membrane is permeable to _________,but impermeable to ___________.
A)nutrients; wastes
B)proteins; nutrients
C)phosphates; wastes
D)nutrients; proteins
E)wastes; nutrients

Question

Quizplus · Accepted Answer

The plasma membrane is selectively permeable, meaning it allows certain substances to pass through while preventing others from entering or leaving the cell. Nutrients, such as glucose and amino acids, can pass through the phospholipid bilayer via transport proteins, making Choice D correct. However, the membrane is impermeable to proteins, which are too large to pass through without the assistance of specialized transport mechanisms. Therefore, Choice B is incorrect. Phosphates do not have a specific characteristic that would make them permeable or impermeable, so Choice C is incorrect. Similarly, whether something is a waste or a nutrient does not inherently determine its ability to cross the lipid bilayer, so Choices A and E are also incorrect.

The Plasma Membrane Is Permeable to _________,But Impermeable to ___________

The Plasma Membrane Is Permeable to _,But Impermeable to ___