Question

1. what is active transport?

Explanation:

Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, against the concentration gradient. This process requires energy (usually from ATP) and specific carrier proteins.

Answer:

Active transport is the movement of substances across a cell membrane from an area of lower concentration to an area of higher concentration (against the concentration gradient), requiring energy (often ATP) and carrier proteins.