In a laboratory activity,red-labeled glucose,blue-labeled water,and green-labeled ethanol are added to a solution placed over an artificial,pure phospholipid membrane.Which colors will be observed on the other side of the membrane after 10 minutes?
A)red
B)blue
C)green
D)b and c

Question

Quizplus · Accepted Answer

Glucose and ethanol are both polar molecules and can pass through the phospholipid membrane by diffusion. The red-labeled glucose and green-labeled ethanol will cross the membrane and be observed on the other side after 10 minutes, resulting in the color red and green, respectively. Water, on the other hand, is a polar molecule and does not freely move across the non-polar phospholipid membrane. Therefore, the blue-labeled water will not be observed on the other side of the membrane after 10 minutes.

In a Laboratory Activity,red-Labeled Glucose,blue-Labeled Water,and Green-Labeled Ethanol Are Added