The transport of amino acids into the cell results when sodium ions move down their electrical gradient and cause amino acids to move into the cell against their electrochemical gradient. This is an example of?

The correct answer is - secondary active transport

Explanation:

Secondary active transport is a type of active transport in which the transporter protein allows the movement of some molecule against the concentration gradient after the transfer of ion (Na + or H+) down its electrochemical gradient.

So in secondary transport the transporter couples the movement of ion with other substance which has to pass the biological membrane. Therefore the transport of amino acid into the cell occurs when sodium ions move down their electrical gradient which is an example of secondary active transport.