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The defining characteristics of active transport are that this category of transport moves substances _________ their concentration gradient and requires ___________.

Respuesta :

Answer:

Against; energy.

Explanation:

1. Active transport is the transport of molecules, in that the particles move across a membrane from a region of lower concentration to a the region of higher concentration with the help of energy.

2. Active transport is the energy-requiring process and results in the transportation of molecules and ions across membrane against a gradient called uphill transport.  

3. Example: The Sodium-Potassium pump.

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