AP BIOLOGY

Detailed explanation-1: -“Active Transport is defined as a process that involves the movement of molecules from a region of lower concentration to a region of higher concentration against a gradient or an obstacle with the use of external energy.”

Detailed explanation-2: -During active transport, substances move against the concentration gradient, from an area of low concentration to an area of high concentration. This process is “active” because it requires the use of energy (usually in the form of ATP). It is the opposite of passive transport.

Detailed explanation-3: -1. The movement of solute particles from low to high concentration is known as C: active transport. During active transport, the movement of solute particles occurs against the concentration gradient. This means that solute particles move from an area of lower concentration to an area of higher concentration.

Detailed explanation-4: -Active transport moves molecules and ions from lower concentration to higher concentration with the help of energy in the form of ATP. On the other hand, passive transport moves molecules and ions from a higher concentration to lower concentration without any energy.