Cellular Respiration: ETC

Question 1

What’s the goal of the ETC?

Answer 1

Extracts the potential energy in the NADH and FADH2 for ATP, occurs in mitochondrial membrane

Question 2

Overall structure of ETC?

Answer 2

Protein complexes I-IV, e- flows through e- transport chain via proton (H+) pumps

Question 3

Step 1 of ETC

Answer 3

NADH donates 2 e- and 1H+

Question 4

Step 2 of ETC

Answer 4

FADH donates 2e- and 2H+ (e- moves through ETC while H+ stays in matrix)

Question 5

Step 3 of ETC

Answer 5

H- gradient forms in inter membrane space due to movement of e- through protein complexes in inner mitochondrial membrane

Question 6

Step 4 of ETC

Answer 6

At end of the ETC, O2 atom accepts 2e- and 2 H atoms to form H2O

Question 7

What are prosthetic groups?

Answer 7

Non-protein components of protein complexes

Question 8

WHat is Ubiquinone (UQ)?

Answer 8

Hydrophobic molecule aka CoQ, it can move e- from I + II to III

Question 9

Do the first three protein complexes increase or decrease in EN as you move along the ETC?

Answer 9

Increase in EN

Question 10

What is ATP Synthase?

Answer 10

Converts ADP to ATP via oxidative (indirect) phosphorylation

Question 11

Role of the proton gradient?

Answer 11

The H+ atoms in the inter membrane space re-enters spontaneously through the mitochondrial matrix to give power to the ATP synthase