AP BIOLOGY

Detailed explanation-1: -Active transport uses energy to transport molecules across the plasma membrane. This uses energy from ATP. They also use pumps to get molecules in or out of the cell. Passive Transport does NOT use energy to transport molecules across the membrane.

Detailed explanation-2: -Active transport is controlled primarily by the cellular membrane. This type of transport is carried out be specialized proteins in the cellular membrane that move substances in or out of the cell again the concentration gradient.

Detailed explanation-3: -The cell membrane, also called the plasma membrane, is found in all cells and separates the interior of the cell from the outside environment. The cell membrane consists of a lipid bilayer that is semipermeable. The cell membrane regulates the transport of materials entering and exiting the cell.

Detailed explanation-4: -ATP is the most common source of energy for active transport. As molecules are moving against their concentration gradients, active transport cannot occur without assistance. A carrier protein is always required in this process.

Detailed explanation-5: -Active transport is the process of moving molecules across a cellular membrane through the use of cellular energy. Credit: Anna Kireieva/Shutterstock.com. The alternative to active transport is passive transport, which uses kinetic energy only to move the molecules.