Simultaneous movement of two molecules across a membrane in the same direction is know as

Simultaneous movement of two molecules across a membrane in the same direction is known as:

Simultaneous movement of two molecules across a membrane in same direction is known as:

When transport proteins simultaneously move two molecules across a membrane in the same direction ,the process is called

When transport proteins simultaneously move two molecules across a membrane in the same direction ,the process is called

Movement of a molecule across a membrane independent of other molecules is known as –