The type of transport that requires the use of transport proteins

Answer 1

The type of transport that requires the use of transport proteins is known as facilitated transport or facilitated diffusion. These transport proteins are embedded within the cell membrane and assist in the movement of specific molecules or ions across the membrane. They create a channel or carrier for these molecules to pass through, allowing them to move down their concentration gradient, from an area of higher concentration to an area of lower concentration. This type of transport does not require energy expenditure by the cell.