Question

Need help asap!!! (SCIENCE)

Which describes a method of active transport?

(A)Water moves through the cell membrane by osmosis.

(B)Proteins carry molecules into or out of the cell.

(C)Molecules move into or out of a cell due to concentration.

(D)Cells rely on external energy to move molecules.

Answer 1

Answer;

(D)Cells rely on external energy to move molecules.

Step-by-step explanation;

• Active transport is the movement of dissolved molecules into or out of a cell through the cell membrane, from a region of lower concentration to a region of higher concentration using energy in the form of ATP.
• In this type of transport,particles move against the concentration gradient, using energy released by hydrolysis of ATP.
• Examples of active transport includes; uptake of glucose in the small intestines and uptake of ions from the soil by root hair cells in plants.