Bioenergetics 4

Question 1

ETC is connected to _______

Answer 1

F1 ATP Synthase

Question 2

What drives the ATP Synthase

Answer 2

O2 is reduced to H2O

Question 3

how many pumps in the ETC

Answer 3

• 3 pumps

- F1 ATP Synthase

Question 4

What occurs at the first pump

Answer 4

• cytochrome oxidase
• NADH is oxidized to NAD at first pump
• the lost H+ sits in the matrix

Question 5

How do stripped off hydrogens move through the ETC?

Answer 5

• hydrogens stripped off NADH loose their electron
• the electron is passed from pump 1, then 2, then 3
• this electric current is used to pump hydrogens out of the matrix into the inter membrane space
• creates a gradient

Question 6

What pump does FADH enter in?

Answer 6

• FADH enters the second pump and is oxidized

Question 7

Does FADH make more or less ATP than NADH?

Answer 7

• FADH misses the first pump, therefore moving less H+ into the inter membrane space
• makes less ATP

Question 8

What does the third pump do?

Answer 8

• attracts electrons
• pulls electrons through the ETC
• molecular O2 is reduced to H2O

Question 9

What does ATP Synthase do?

Answer 9

• has a pore for H+ flow back through
• pore/turbine
• ATP is remade: ATP + Pi –> ATP

Question 10

how many H+ must flow back through ATP Synthase to make 1 ATP

Answer 10

3 H+

Question 11

in glycolysis how many net ATP are made?

Answer 11

• 2 net ATP

- glycogen 3 net ATP

Question 12

overall efficiency of anaerobic glycolysis is ____

Answer 12

~2%

Question 13

overall efficiency of aerobic respiration is ____

Answer 13

~34%

Question 14

why is aerobic break down of glucose more efficient? how much more efficient is it?

Answer 14

16x more efficient due to the ETC

Question 15

__ glucose makes __ pyruvate
__ pyruvate makes __ acetyl CoA
__ acetyl CoA goes through __ turns of ________
__ turns of ________ makes 6______ and 2______

Answer 15

2, 2 
2, 2
2, 2, krebs cycle 
2, krebs cycle
6 NADH, 2 FADH

Question 16

for every _____ we make 2.5 ATP at the level of ____

Answer 16

NADH, ETC

Question 17

for every _____ we make 1.5 ATP at the level of ______

Answer 17

FADH, Krebs cycle

Question 18

can you break down fat anaerobically?

Answer 18

no

Question 19

___ is good for moderate exercise

___ is good for high intensity exercise

Answer 19

FAT

CHO

Question 20

Why does a build of lactate impair performance during exercise?

Answer 20

• makes you rely on CHO
• CHO is good for short bursts of high intensity
• can make you “hit the wall”