etc part 1+ ox phos part 1

Question 1

where does etc and ox phos happen in euk.

Answer 1

inner mito membrane

Question 2

where does oxphos and etc happen in prok

Answer 2

inner cell membrane

Question 3

what energizes the etc

Answer 3

nadh and fadh2 made in glyc. pdh rxn and tca

Question 4

where is more atp made

Answer 4

by ox phos

Question 5

what is inner membrane impermeable to

Answer 5

• most ions and molecules like H+

Question 6

where are the high energy electron paris NADH2 and FADH2 transferred to

Answer 6

oxygen via etc

Question 7

how is energy released in the mito used

Answer 7

• used to pump protons into the intermembrane space to get charge separation

Question 8

what is the mitochon known for

Answer 8

cellular batter

Question 9

what drives atp synthase

Answer 9

electrochemical energy of protons falling back to matrix

Question 10

what is the route of NADH in etc

Answer 10

Nadh > I> Q> 3> cyt c> 4> o2
produces 10H+

Question 11

route of fadh2

Answer 11

fadh2>2>Q>3>cytc > 4> o2
6H+ out

Question 12

what are the moble e- carriers

Answer 12

ubiqunione and cytochrome c

Question 13

what is proton motive force

Answer 13

concentration gradient of H= across a membrane is harnessed to make atp

Question 14

what complex has fmn redox coenzyme

Answer 14

1

Question 15

coenzyme q is present in what complex

Answer 15

3

Question 16

what does ubiquionene do

Answer 16

carries e= from complex I/II to complex 3

Question 17

what complex has the rieske iron sulfer center and q cycle

Answer 17

complex 3

Question 18

where does cytochrome c carry electrons

Answer 18

complex 3 to 4

Question 19

why us cytochrom c diff

Answer 19

peripheral membrane protein while other cytochromes are integral

Question 20

1 electron carrier needs how many cyt cs

Answer 20

2 cyt c ( 2 electrons from nadh)

Question 21

what is a protein w/ a heme posthetic group that is involved in e- transfer

Answer 21

cytochromes

Question 22

what does the heme fe alternate between

Answer 22

Fe+2 (ferrous) and Fe+3( ferric) states

Question 23

what happens to the coordination sites for the hemes in cytochrom

Answer 23

• all 6 are occupied do not bind to O2

Question 24

what atom does complex 4 have

Answer 24

copper
cycle between reduced Cu+ (cuprous) and oxidized Cu+2 state cupric

Question 25

what cytochrome does complex 4 have

Answer 25

cyt a3 and binds and reduces O2 to water

Question 26

what complex has cytochrome bc1 comples, coQ cytochrom c reductase, cytochrome c-CoQ oxidreductase

Answer 26

3

Question 27

wht complex has cytochrome c oxidase

Answer 27

4

Question 28

succinate dh is what complex of etc

Answer 28

2

Question 29

what does complex 2 do

Answer 29

transfers e- directly to q skipping complex 1
- doesn’t directly contribute to pumpoing out of protons

Question 30

how did scientists disocer the order of the sequence of complexes

Answer 30

measured standard reduction potentials of all components - more positive the closer to O3

Question 31

how did scientists discover thre order of the sequence of complexes

Answer 31

• look for intercting between complexes
• inhibitors see which metabolites build up

Question 32

what happens with o2 consumption

Answer 32

stops an addition of an inhibitor