electron transport chain Flashcards by Patricia Kane

Q

location

A

inner mitochondrial membrane

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Q

proton gradient

A

inner membrane&raquo_space; matrix (wrt H+)

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Q

ATP synthase

A

uses H+ gradient to rotate subunits to make ATP

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Q

ETC maintains

A

H+ gradient

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Q

Complexes that pump H+

A

I, III, IV pump H+ into inner membrane

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Q

complex II

A

promotes H+ pumping in III and IV

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Q

H+ pumping requires

A

E; comes from e- exchange

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Q

complex I requires

A

NADH+

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Q

redox centers

A

pass e- from low affinity to high affinity

releases E when passed; E used to pass H+

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Q

last redox center

A

donates 2 e- to coenzyme Q

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Q

coenzyme Q

A

transports e- to III

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Q

complex II requires

A

FADH2

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Q

complex II different from complex I how?

A

does NOT use E to pump H+

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Q

complex III

A

2 e- pass through 2 redox centers –> cytochrome C

one e- recyclable

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Q

cytochrome C

A

takes electrons to complex IV

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Q

complex IV

A

uses 4 e- and H+ to turn O –> H2O

also pumps H+ into inner membrane