Question

what process requires both a carrier protein and energy? multiple choice active transport simple diffusion osmosis facilitated diffusion

Explanation:

• Simple diffusion: Moves substances down concentration gradient, no carrier protein or energy needed.
• Osmosis: Movement of water, no carrier protein or energy needed.
• Facilitated diffusion: Uses carrier proteins but moves down gradient, no energy needed.
• Active transport: Moves substances against concentration gradient, requires carrier proteins and energy (e.g., ATP).

Answer:

A. active transport