KA2- Electron transport chain

Question 1

What is ETC?

Answer 1

A group of protein molecules embedded in the inner mitochondrial membrane

Question 2

What do these protein molecules act as?

Answer 2

Electron acceptors and carriers collecting high energy electrons from NADH

Question 3

Where do these electrons flow along?

Answer 3

A chain of electron acceptors releasing energy, which is sued to pump H+ ions across the membrane from the matrix to the inner membrane space by active transport

Question 4

What do high energy electrons drive?

Answer 4

The pumps which move H+ ions through the membrane

Question 5

What does this pump create?

Answer 5

A high concentration of H+ between the mitochondrial membranes

Question 6

What is oxygen?

Answer 6

The final hydrogen ion/electron acceptor

Question 7

What will the chain no operate without?

Answer 7

Oxygen

Question 8

What happens when electrons reach the end of the chain?

Answer 8

They combine with H+ ions and oxygen to form water

Question 9

The return flow of H+ ions occurs through what?

Answer 9

ATP synthase which is embedded in the mitochondrial membrane