Passage of substance across cell membrane against concentration gradient requires energy in the form of ATP and it is called Active transport. Which of the following is the example of secondary active co-transport?Select one:a. Sodium potassium ATPase pumpb. Sodium hydrogen transportc. Sodium glucose transportd. Hydrogen pump

The example of secondary active co-transport is c. Sodium glucose transport.

Here's why:

Active transport is the process where substances move across the cell membrane against their concentration gradient, meaning they move from an area of low concentration to an area of high concentration. This process requires energy in the form of ATP (Adenosine Triphosphate).

There are two types of active transport: primary and secondary.

Primary active transport directly uses energy to transport molecules across a membrane. An example of this is the Sodium-Potassium ATPase pump.

Secondary active transport, on the other hand, is a form of active transport across a biological membrane in which a transporter protein couples the movement of an ion (typically Na+ or H+) down its electrochemical gradient to the uphill transport of another molecule or ion against a concentration/electrochemical gradient.

In the case of Sodium glucose transport, the sodium ion's movement down its gradient is used to power the uphill transport of glucose into the cell. This is an example of secondary active co-transport.