What Are The Types Of Active Transport [ SIMPLE ]

“See that?” ATP said proudly. “I use my own energy directly. I’m the battery that powers the pump.”

This is the most direct form of active transport. It uses chemical energy, typically from , to move molecules across a membrane via a protein pump.

The vesicle blinked. “What about me? I wrap around big molecules and bring them into the cell. Is that active transport?”

But then, a more complex problem arrived. A large, sad sucrose molecule named Suzy stood at the gate. She was too big for the Uniporter. Worse, she was trying to enter against her concentration gradient. ATP couldn’t carry her alone.

“See that?” ATP said proudly. “I use my own energy directly. I’m the battery that powers the pump.”

This is the most direct form of active transport. It uses chemical energy, typically from , to move molecules across a membrane via a protein pump.

The vesicle blinked. “What about me? I wrap around big molecules and bring them into the cell. Is that active transport?”

But then, a more complex problem arrived. A large, sad sucrose molecule named Suzy stood at the gate. She was too big for the Uniporter. Worse, she was trying to enter against her concentration gradient. ATP couldn’t carry her alone.