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olga2289 [7]
3 years ago
12

When does the cell have to use active transport

Biology
1 answer:
bulgar [2K]3 years ago
3 0
Active Transport<span> is used when substances are to be transported against their concentration gradient ( from low concentration to high concentration ) by utilising energy from ATP.
</span>
eg - Na+/K+ pump.


    hope it helps u.....
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