Which of the following is an example of active transport?

Correct answer is Sodium and potassium pumps.

Key Points

• The Sodium-potassium pump present on the cell membrane is a classic example of active transport.
• Which transports 3 sodium ions outside and 2 potassium ions inside of the cell per ATP.
• Active transport is used by cells to accumulate needed molecules such as glucose and amino acids. 
• Active transport powered by adenosine triphosphate (ATP) is known as primary active transport.
• Transport that uses an electrochemical gradient is called secondary transport.
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Additional Information

• Iron assimilation_​ The absorption of most dietary iron occurs in the duodenum and proximal jejunum and depends heavily on the physical state of the iron atom.
• The reversibility of the salt elimination reaction can be attributed to the solvation of the sodium cations by tetrahydrofuran, and the affinity of the Lewis acidic lanthanide centers for tetrahydrofuran and chloride relative to the aminodiboranate anion.
• Glucose transporters are a wide group of membrane proteins that facilitate the transport of glucose across the plasma membrane, a process known as facilitated diffusion.