Question

which of the following will not speed up the net rate of diffusion for glucose into a cell? a) increasing the number of glucose transport proteins within the plasma membrane. b) decreasing the number of phospholipids in the plasma membrane. c) decreasing the concentration of glucose within the cell. d) increasing the concentration of glucose outside of the cell.

Explanation:

The rate of glucose diffusion into a cell depends on factors like the number of glucose - transport proteins, and the concentration gradient of glucose. Phospholipids in the plasma membrane form the basic structure of the membrane but do not directly participate in glucose transport. Decreasing their number will not speed up glucose diffusion. Increasing glucose - transport proteins helps in facilitated diffusion, decreasing intracellular glucose or increasing extracellular glucose increases the concentration gradient which speeds up diffusion.

Answer:

B. Decreasing the number of phospholipids in the plasma membrane.