Question

In which type of cellular transport to molecules bind to channel proteins in order to move across a selectively permeable membrane against a concentration gradient?

A facilitated transport
B active transport
C diffusion
D osmosis

Answer 1

Molecules bind to channel proteins and use energy to move against a concentration gradient in a process called B. active transport.

Step-by-step explanation:

The type of cellular transport where molecules bind to channel proteins to move across a selectively permeable membrane against a concentration gradient is known as B. active transport.

During active transport, cells utilize energy in the form of ATP to move substances from an area of lower concentration to an area of higher concentration.

This process is facilitated by transport proteins that act as 'pumps'. Unlike facilitated transport and diffusion, which are passive and do not require energy, active transport allows cells to maintain concentration gradients that are essential for various cellular functions.