Chemiosmosis and Oxidative Phosphorylation - Respiration

Question 1

1.

Answer 1

Reduced NAD and reduced FAD diffuse to cristae, where they are oxidised by dehydrogenase to NAD and FAD.

Question 2

2.

Answer 2

H atoms removed are split into protons and electrons. The electrons are passed down a series of carriers, releasing energy.

Question 3

3.

Answer 3

Some of the energy released is used to pump protons into the intermembranal space.

Question 4

4.

Answer 4

This sets up a proton/electrochemical gradient, where the protons are moved by proton motive force.

Question 5

5.

Answer 5

Protons diffuse down gradient through ATP synthase releasing energy, which is used to phosphorylate ADP + Pi into ATP.

Question 6

6.

Answer 6

Oxygen is the final proton and electron acceptor so metabolic water forms.