Question

Provide an example of symport.

Answer 1

Symport:

1. Symport is an active mode of transportation.
2. It exploits the uphill movement of other molecules from low to high concentration, which occurs against the electrochemical gradient, to transfer solute species downhill from high to low concentration.
3. A symporter is a membrane protein that facilitates the simultaneous transport of two distinct substances across the cell membrane.
4. The symporter is a sort of cotransporter that functions in the plasma membrane.
5. It transports molecules across the cell membrane at the same time.

Example:

1. An example of a glucose symporter is SGLT1 (sodium-glucose linked transporter).
2. In the first step in the absorption of sugars from nutrients, glucose and galactose are transported to the luminal (intestinal) side of enterocytes by SGLT1.