Question and answer
When does the cell have to use active transport? A. when the cell is low on energy B. when the cell is in a highly concentrated solution C. to move molecules across the membrane quickly D. to move molecules across the membrane against a gradient
The cell has to use active transport: to move molecules across the membrane against a gradient.
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Expert answered|gasha|Points 20|
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Asked 2/5/2013 9:17:18 AM
Updated 3/3/2017 11:23:35 AM
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This answer has been confirmed as correct and helpful.
Edited by Janet17 [3/3/2017 11:23:32 AM], Confirmed by Janet17 [3/3/2017 11:23:35 AM]
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