level: 4.4 Active transport
Questions and Answers List
level questions: 4.4 Active transport
| Question | Answer |
|---|---|
| Active transport definition | - The movement of molecules into or out of a cell from a region of lower concentration to a region of higher concentration - Using ATP and carrier proteins - ATP releases energy so that molecules can be transported |
| The main differences between active transport and facilitated diffusion | - AT: carrier proteins, ATP used, against concentration gradient - FD: carrier + channel proteins, ATP not used, down concentration gradient |
| Carrier proteins role in active transport | - Co-transporters (type of carrier protein) - Bind two molecules at a time - The concentration gradient of one molecules is used to move the other molecule against its own concentration gradient |