In Secondary Active Transport

Multiple Choice

In secondary active transport

A) Molecules are able to cross the plasma membrane unassisted with the help of ATP.
B) a gradient is set up by a pump which then provides the potential energy to move a different molecule against its concentration gradient.
C) two molecules are simultaneously moved across the cell membrane down their concentration gradients with the help of transport proteins.
D) water is moved across the cell membrane based on solute concentration.