A transport protein that simultaneously transports two different molecules in different directions is called:

A cell may allow a large or charged chemical to move across the cytoplasmic membrane, down the chemical’s electrical and chemical gradients, in a process called _________ .                   .

a. active transport

b. facilitated diffusion

c. endocytosis

d. pinocytosis

Compare and contrast three types of passive transport across a cell membrane.

Passive membrane transport processes include___________.

What is the difference between active and passive transport across a membrane?

Which option below best describes a transporter that requires ATP to move molecules A and B out of the cell?

A cell may allow a large or charged chemical to move across the cytoplasmic membrane, down the chemical’s electrical and chemical gradients, in a process called _________ .                   .

a. active transport

b. facilitated diffusion

c. endocytosis

d. pinocytosis