Question

movement of molecule x
(1) high concentration → low concentration
(2) high concentration → low concentration
(3) low concentration → high concentration
(4) low concentration → high concentration
use of atp
(1) used
(2) not used
(3) used
(4) not used
which row in the chart best describes the passive transport of molecule x through a cell membrane?

Explanation:

Passive transport moves molecules from high to low concentration and does not use ATP. Row (2) in the chart shows movement from high to low concentration and no use of ATP, which is characteristic of passive transport.

Answer:

(2) high concentration → low concentration, not used