Question

a type of cellular transport is shown. which description best identifies this type of cellular transport? a active transport, because energy is being used to move molecules against the concentration gradient. b facilitated diffusion, because energy is being used to move molecules with the concentration gradient. c osmosis, because energy is not being used to move molecules with the concentration gradient. d endocytosis, because energy is not being used to move molecules against the concentration gradient.

Explanation:

Active transport requires energy (ATP shown in the image) and moves molecules against the concentration gradient. In the diagram, ATP is being used and molecules are moving from an area of lower concentration to higher concentration. Facilitated diffusion doesn't require energy, osmosis is the diffusion of water and doesn't use energy, and endocytosis is a different type of transport involving the cell membrane engulfing substances.

Answer:

A. Active transport, because energy is being used to move molecules against the concentration gradient.