Question

Some molecules are unable to enter cells by diffusion, and instead, must use active transport. How is diffusion different from active transport?

Answer 1

Answer: See Below

Step-by-step explanation:

Diffusion is considered passive transport because it does not require energy to move molecules across the membrane. This is possible because of difference in concentration gradient. Molecules will flow from a higher concentration to a lower in order to make uniform concentrations, this is a natural process that does not require energy.

Active transport requires energy, typically in the form of ATP to transport molecules against a concentration gradient.