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Answer:

A co-transported molecule travels down an electrochemical gradient in either direction.

The coupled transport allows a molecule to be transported against the electrochemical gradient as Co-transported molecules can move in either direction along an electrochemical gradient. This is further explained below.

What is coupled transport?

Generally, coupled transport is simply defined as the simultaneous passage of two substances over a biological membrane.

In conclusion, Because molecules that are co-carried can travel in either way along an electrochemical gradient, linked transport enables molecules to be transported in the opposite direction of the electrochemical gradient.

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