Question

Which is a form of active transport?

A.
Proteins open up channels in the cell membrane.

B.
Proteins push molecules through the cell membrane.

C.
Proteins create openings on another side of the cell membrane.

D.
Proteins enter and exit the cell freely.

i have no idea which one it is

Answer 1

http://www.biology4kids.com/files/cell2_activetran.html

Answer 2

I believe it's B? because it's pushing so I'm assuming it's using energy (which is active transport)

Answer 3

The answer is B. Some proteins present in the membrane move polar molecules by using the energy in the form of ATP.