Bonnie

Chemistry

2 March, 22:22

1. A scientist investigating the cell membrane concludes that a particular substance is transported

by active transport. Which observation would support this conclusion?

The substance moves along the concentration gradient toward a region of lower

concentration

O B. The transport of the substance into the cell is reduced or reversed in the absence of ATP.

The direction of transport changes when the external solution is changed from a

hypertonic solution to a hypotonic solution.

Transport proteins embedded in the plasma membrane assist in the transport of the

substance into the cell.

O

What's the answer