If a substance must move up a concentration gradient, it means that it is moving from an area of low concentration to an area of high concentration. In order to achieve this, the cell would need to provide energy in the form of ATP (adenosine triphosphate) to transport the substance against the concentration gradient. This process is known as active transport, and it allows cells to maintain internal concentrations of substances that differ from their surroundings.
Hi! To move a substance up its concentration gradient, the cell must provide energy, which is typically in the form of adenosine triphosphate (ATP). This process is called active transport, as it requires the cell to expend energy to transport the substance against its concentration gradient.