ETC Flashcards
Where does the ETC get electrons from
NADH and FADH2
ETC transfers electors from [low/high] to [low/high] electron affinity
ETC transfers electors from low to high electron affinity
What gradient is formed in the ETC
chemiosmotic or electrochemical gradient
What role does CoQ have in the ETC
helps link complexes I and II to complex III
what complex dehydrogenates NADH
Complex 1
what enzyme removes the Hydrogen from NAHD
NADH dehydrogenase
Name 4 electron carries within the complexes
Iron (Fe+3–> Fe+2)
Copper (Cu+1 –> Cu+2)
Riboflavin (FMN –> FMNH2)
Quinone (Q–> QH2)
what is another name for riboflavin
B2
what 2 roles does Complex I do
- accept NADH + donates e- to CoQ
- use e- energy to pump H+ into intermembrane space
What 1 role does complex II do
accept e- from FADH2 and donates to CoQ
What is another name for Complex II
succinate dehydrogenase
Which has more energy? NADH or FADH2
NADH as can pump H+ into intermembrane space
CoQ role
no contribution to H pumping
connects complexes
what is another name for CoQ
coenzyme Q10 or ubiquinone
Complex III role
accept e- from CoQ and donate to cytochrome c
Pump H+ into intermembrane space
what is another name for Complex III
cytochrome c reductase
cytochrome c role
accepts e- from complex III and donates to complex IV
no contribution to H pumping
just connects complexes
is cytochrome c polar or non polar + where is it
POLAR
hydrophilic and soluble in intermembrane space
moves along inner membrane
what does complex IV do
accepts e- from cytochrome c and donates to Oxygen and make water
use e- to pump H+ into intermembrane space
Which aspects of ETC are embedded in membrane
Complex I
Complex II
Complex III
Complex IV
What is soluble in the intermembrane space
cytochrome c
what is soluble in the inner membrane
CoQ
How many ATP does 1 NADH make
3 ATP
how many ATP does 1 FADH2 make
2 ATP
