Electron Transport Chain + Chemiosmosis

Question 1

3 areas of major importance in the mitochondria for electron transport chain

Answer 1

1. Mitochondrial Matrix
2. Inner mitochondrial membrane
3. Intermembrane space

Question 2

What does Succinate Dehydrogenase do?

Answer 2

• Protein that allows FADH2 to enter if NADH + H+ has not come in already

Question 3

What happens in chemiosmosis?

Answer 3

• H+ ions are pumped through ATP Synthase
• Causes ADP + Pi to react and form ATP

Question 4

Summary of the Electron Transport Chain

Answer 4

• Involves several membrane bound proteins and active molecules
• Pumps 3H+’s per NADH
• Pumps 2H+’s per FADH2

Question 5

Summary of Chemiosmosis

Answer 5

• Creates an electrochemical or proton gradient which motivates H+ to re-enter the matrix through ATP synthase
• The electrochemical gradient creates a “proton motive force” which moves H+ ions

Question 6

What starts the electron transport chain?

Answer 6

• NADH + H+ gets oxidized to NAD+

Question 7

What is O2 in the ETC

Answer 7

• “ultimate electron acceptor”
• because of it’s high electronegativity

Question 8

What is H2O in the ETC?

Answer 8

The last molecule that contains glucose’s electrons