7.2.5 - Oxidative Phosphorylation

Question 1

Describe Oxidative Phosphorylation
(2 Points)

Answer 1

~ Last stage of aerobic respiration.

~ Takes place in the inner mitochondrial membrane.

Question 2

Describe The Process Of Oxidative Phosphorylation
(6 Points)

Answer 2

~ Hydrogen atoms donated from reduced NAD and reduced FAD, as they become oxidised, these hydrogen atoms then split into protons and electrons.

~ The electrons move down the ETC, releasing energy as they do so.

~ The energy produced is used to pump protons from the matrix into the inter membrane space, establishing a concentration gradient.

~ Protons move down the concentration gradient, back into the matrix via facilitated diffusion through the channel enzyme ATP synthase.

~ This movement of protons provides energy to combine ADP + Pi to form ATP.

~ Oxygen acts as the final electron acceptor, combining with protons and electrons at the end of the ETC to form water.

Question 3

How Many ATP Molecules Are Produced, For Every Molecule Of Glucose?

Answer 3

38 ATP molecules.