It is a transport protein that undergoes conformational change (change in shape) when transporting molecules in and out of the cell.
Question
It is a transport protein that undergoes conformational change (change in shape) when transporting molecules in and out of the cell.
Solution
This seems like a statement rather than a question. However, it appears to be describing a type of protein known as a carrier protein. Carrier proteins are integral membrane proteins; that is, they exist within and span the membrane across which they transport substances. They undergo a conformational change to facilitate the movement of substances in and out of the cell. This process is often against the concentration gradient, and thus requires energy. The substances that are transported are usually ions or molecules that are not able to pass through the cell membrane on their own.
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