​Once Glucose Has Entered a Cell, What Prevents It from Diffusing

question 17

Multiple Choice

​Once glucose has entered a cell, what prevents it from diffusing back out of the cell?

• A) ​Glucose pumps actively transported any leaked glucose back into the cell.
• B) ​One side of the cell membrane is permeable to glucose, but the other side is not.
• C) ​Glucose inhibitors attach to glucose once it's in the cell.
• D) ​Glucose is phosphorylated, preventing it from leaving the cell.
• E) ​Glucose is hydrolyzed into two three-carbon molecules that cannot diffuse in a reverse direction.

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