Module 9- Final Exam Study

Question 1

In which cellular organelle does the electron transport system function?

Answer 1

Intermembrane of the mitochondria

Question 2

How many “complexes” occur in the electron transport system?

Answer 2

Be active in the matrix- 3 complexes occur

Question 3

In which complex of the electron transport system does NADH interact?

Answer 3

Complex 1

Question 4

In which complex of the electron transport system does FADH2 interact?

Answer 4

Complex 2

Question 5

What molecule serves as the terminal electron acceptor of the electron transport system?

Answer 5

O2

Question 6

Each time NADH, FADH2, and oxygen interact with the electron transport system, what gets “pumped” from one part of the mitochondria to another part of the mitochondria?

Answer 6

H+

Question 7

From which part of the mitochondria do these things get pumped from and where are they pumped to?

Answer 7

Pumped from matrix to the intermembrane space

Question 8

From which part of the mitochondria do these things get pumped from and where are they pumped to?

Answer 8

Pumped from matrix to the intermembrane space

Question 9

These things that are getting pumped are associated with ATP production. What do these things do that contributes to ATP production?

Answer 9

As H+ flows back through, the energy of the ion flow drives phosphorylation of ADP to produce ATP

Question 10

How many ATP can be produced by the interaction of one NADH with the electron transport system?

Answer 10

3

Question 11

How many ATP can be produced by the interaction of one FADH2 with the electron transport system?

Answer 11

2

Question 12

There is an enzyme involved in ATP production associated with the electron transport system. What is the name of this enzyme?

Answer 12

ATP Synthetase

Question 13

How many ATP can be produced by the complete oxidation of one glucose molecule?

Answer 13

2

Question 14

Even though one NADH is produced during glycolysis, this NADH is not going to result in production of the same number of ATP that NADH that occurs from the TCA cycle will. Why is this?

Answer 14

Depends on where in the electron transport chain system the H+ are transferred- NADH transfers at the beginning- would result in enough H+ pumped in so that when they flow back, 3 ATP can be formed- FADH2 transfers at a point where 2 ATP will result

Question 15

In addition to the NADH that occurs from glycolysis, what general reactions or cycles will result in production of the remaining NADH associated with the complete oxidation of glucose?

Answer 15

2 pyruvates produce 8 NADH, cytosolic NADH produces 2 ATP each, and mitochondrial NADH produces 3 ATP each