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Question

The absorption of nutrients, like amino acids, occurs via co-transport channels, which couple with the movement of Na+. Which of the following statement is true for this type of co-transport?

A
In this both amino acids and Na+ move down a electrochemical gradient.
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B
Both amino acids and Na+ are absorbed agfainst the electrochemical gradient
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C
Amino acids are absorbed against the electrochemical gradient and Na+ moves towards the electromagnetic gradient.
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D
Amino acids move towards the electrochemical gradient and Na+ against the electrochemical gradient.
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Solution

The correct option is D Amino acids move towards the electrochemical gradient and Na+ against the electrochemical gradient.
The transport of amino acids takes place with the help of co-transporters where amino acids move along the concentration gradient while Na^+ moves against the concentration gradient.
So, the correct answer is 'Amino acids move towards the electrochemical gradient and Na+Na+ against the electrochemical gradient'

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