Refer to the figure below. According to the graph, as the number of glucose molecules increases, the rate of diffusion across a membrane
A) increases indefinitely.
B) decreases.
C) increases until a plateau is reached.
D) can either increase or decrease.
E) remains unchanged.

Question

Refer to the figure below.  According to the graph, as the number of glucose molecules increases, the rate of diffusion across a membrane
A) increases indefinitely. 
B) decreases. 
C) increases until a plateau is reached. 
D) can either increase or decrease. 
E) remains unchanged.

Quizplus · Accepted Answer

The graph shows that the rate of diffusion initially increases with increasing glucose concentration, but eventually levels off and reaches a plateau. This indicates that there is a limit to the rate of diffusion, and once the concentration of glucose is high enough, further increases have no effect on the rate of diffusion. Therefore, the correct answer is C - the rate of diffusion increases until a plateau is reached.

Refer to the Figure Below