Biology help: ________ is/are an example(s) of active transport.
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Biology help: ________ is/are an example(s) of active transport.

[From: ] [author: ] [Date: 12-03-05] [Hit: ]
......
a. transport of Na+ down its concentration
gradient
b. transport of proline (amino acid) from where it
is in a high concentration to where it is in a low
concentration
c. transport of Ca+ against its concentration
gradient
d. all of the above

ty in advance

-
Active transport is usually always against the concentration gradient, so C is correct.
1
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