Chapter 18 ETC

Question 1

four complexes of ETC

Answer 1

NADH-Q oxidoreducatase, succinate-Q reductase, Q-cytochrome c oxidoreductase, cytochrome c oxidase

Question 2

three proton pumps of ETC

Answer 2

NADH-Q oxidoreducatase, Q-cytochrome c oxidoreductase, cytochrome c oxidase

Question 3

complex 1

Answer 3

NADH-Q oxidoreducatase

Question 4

complex 2

Answer 4

succinate-Q reductase

Question 5

complex 3

Answer 5

Q-cytochrome c oxidoreductase

Question 6

complex 4

Answer 6

cytochrome c oxidase

Question 7

complex 1 function

Answer 7

transfer electrons from NADH to Q

Question 8

complex 2 function

Answer 8

transfer electrons from FADH2 to Q

Question 9

complex 3 function

Answer 9

transfer electrons from Q to cytochrome c

Question 10

complex 4 function

Answer 10

transfer of electrons from cytochrome c to O2

Question 11

electrons passed from ? to ? electrode potential

Answer 11

low to high

Question 12

high/low electrode potential is indicative of high affinity for electrons

Answer 12

high

Question 13

net reaction of complex 3

Answer 13

QH2 + 2cytC (ox) + 2H+ (matrix) goes to Q + 2cytC (red) + 4H+ (cytoplasm)

Question 14

ETC pumps protons into ?

Answer 14

intermembrane space

Question 15

complex 4 produces water in ?

Answer 15

matrix

Question 16

superoxide dismutase reaction

Answer 16

2O2- + 2H+ goes to O2 + H2O2

Question 17

catalase reaction

Answer 17

2H2O2 goes to O2 + 2H2O

Question 18

ATPsynthase structure

Answer 18

one gamma subunit, three alpha, three beta

Question 19

gamma subunit induces beta subunit into these three conformations

Answer 19

open, loose, tight

Question 20

open conformation of ATPsynthase

Answer 20

allows ATP to be released and allows ADP and Pi to enter

Question 21

loose conformation of ATPsynthase

Answer 21

holds ADP and Pi in place

Question 22

tight conformation of ATPsynthase

Answer 22

forces ATP synthesis from ADP and Pi

Question 23

number of protons transported across ATPsynthase per turn

Answer 23

12

Question 24

number of ATP made per turn

Answer 24

3

Question 25

number of proton transfers required to make one ATP

Answer 25

4

Question 26

ATP/O ratio for ATP synthesis

Answer 26

2.5 (10/4). 4 protons required for ATP synthesis. Ten protons pumped per NADH to reduce one oxygen.

Question 27

protons pumped per NADH

Answer 27

10

Question 28

G3P shuttle function

Answer 28

Allows NADH produced in glycolysis to be incorporated in ETC

Question 29

G3P shuttle net reaction

Answer 29

NADH + H+ +EFAD goes to NAD+ + EFADH2. EFADH2 transfers electrons to Q.

Question 30

malate-aspartate shuttle function

Answer 30

electrons transported from NADH to malate, malate moves into matrix from cytoplasm, malate gives electrons to NAD+. Glutamate is transported across membrane to cytoplasm by converting to aspartate.

Question 31

protons pumped per FADH2

Answer 31

6

Question 32

glycolysis yield

Answer 32

2 ATP, 2NADH

Question 33

pyruvate dehydrogenase yield

Answer 33

2 NADH

Question 34

CAC yield

Answer 34

2ATP, 6NADH, 2FADH2

Question 35

NADH and FADH2 yield from glycolysis and CAC for one glucose

Answer 35

10NADH and 2FADH2

Question 36

ATP yield from glycolysis and CAC for one glucose

Answer 36

4ATP

Question 37

10NADH pumps ? protons

Answer 37

100

Question 38

2FADH2 pumps ? protons

Answer 38

12

Question 39

112 protons pumped creates ? ATP

Answer 39

28

Question 40

net ATP yield of one glucose molecule through glycolysis, CAC and ETC

Answer 40

32