Homework Help: bio

Posted by anmol on Sunday, February 19, 2012 at 9:16pm.

How does active transport differ from passive
transport?
1. Molecules move down a concentration
gradient in active transport.
2. Carrier proteins are used only in active
transport.
3. Energy is required only in active trans-
port.
4. Energy is required only in passive trans-
port.

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