Energetics of Oxidative Phosphorylation

Question 1

each NADH in the mitochondrial matrix yields how much ATP?

Answer 1

2.5

Question 2

each NADH in the cytoplasm yields how much ATP?

Answer 2

1.5 or 2.5 depending on the shuttle used

Question 3

Each FADH2 yields how much ATP?

Answer 3

1.5

Question 4

How much energy gets released along the ETC?

Answer 4

negative 220 kj

Question 5

How much energy does it take to pump one proton into the intermembrans space?

Answer 5

20.9 kj

Question 6

How many protons does it take to turn the c subunit rotor 1 full cycle?

Answer 6

10 protons

Question 7

How many ATP are made from one full revolultion of c subunits?

Answer 7

3

Question 8

How many protons are needed to make 1 ATP molecule?

Answer 8

4 protons to make 1 ATP

Question 9

NADH using G3P shuttle contributes to how much ATP being made? Why?

Answer 9

1.5 because the NADH reduces FADH2 and it enters the ETC at complex II thus pumping 6 protons

Question 10

Where is the G3P mainly found?

Answer 10

Skeletal muscle and brain cells

Question 11

NADH using the malate-aspartate shuttle contributes to how many ATP being used? Why?

Answer 11

2.5 ATP because it enters at complex I, thus pumping 10 protons

Question 12

Where is the malate-aspartate shuttle found?

Answer 12

Heart muscle and liver

Question 13

Why does the heart and liver need more ATP?

Answer 13

Because the heart is always pumping and the liver…