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A protein channel is a transport protein that: A. always moves substances against a concentration gradient. B. pumps ions out of a cell. C. serves as a tunnel for specific substances. D. always requires energy from the cell.
A protein channel is a transport protein that: serves as a tunnel for specific substances.
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Asked 2/1/2012 3:31:22 PM
Updated 9/24/2017 1:42:32 PM
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Edited by Janet17 [9/24/2017 1:42:32 PM]
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A protein channel is a transport protein that: serves as a tunnel for specific substances.
Added 9/24/2017 1:42:15 PM
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Binary fission is a process through which
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Updated 12/18/2014 8:13:53 AM
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Binary fission is a process through which prokaryotes produce new individuals that are genetically identical to the parent organism .


Added 12/18/2014 8:13:53 AM
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Rated good by Kaysha, Confirmed by Kaysha [12/18/2014 8:16:02 AM]
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