Question

which factor would most likely increase the rate of passive transport across a cell membrane?
adding more atp to the cell
increasing the concentration gradient across the membrane
increasing the size of the molecules
decreasing the temperature of the environment

Explanation:

Passive transport relies on concentration gradients and does not require ATP. Larger molecules diffuse more slowly and lower temperatures slow molecular motion. Increasing the concentration gradient provides a greater driving - force for passive transport.

Answer:

B. Increasing the concentration gradient across the membrane