9.4 oxidative phosphorylation Flashcards Preview

Biology AP- 9 Cellular Respiration > 9.4 oxidative phosphorylation > Flashcards

Flashcards in 9.4 oxidative phosphorylation Deck (13)
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1
Q

where is the ETC

A

inner membrane of the mitochondria

2
Q

structure of ETC

A

most of the components of the chain are proteins
in multi protein complexes I-IV

-tightly bound to the proteins are prosthetic groups

3
Q

prosthetic groups

A

nonprotein components essential for the catalytic functions of certain enzymes

4
Q

what happens as they go down the chain

A

drop in free energy

–the components switch from reduced to oxidized as they take and pass on electrons from their neighbors

5
Q

1:

A

NADH gives electrons to flavoprotein

6
Q

2:

A

flavoprotein passes electrons to iron sulfur protein

7
Q

3:

A

iron sulfur protein passes electrons to ubiquinone

8
Q

Ubiquinone

A

AKA Coenzyme Q

only non protein in ETC

hydrophobic molecule
–mobile within the membrane rather than attached to a complex

9
Q

4:

A

remaining electron carriers in the ETC are cytochromes with different heme groups

10
Q

cytochromes

A

proteins that have a prosthetic group called a heme group
(iron atom that accepts and donates electrons)

like in HEMoglobin –except for electrons instead of O2

11
Q

5:

A

last cytochrome

cyt a3 -> passes electrons to oxygen

12
Q

6:

A

Oxygen is very electronegative

Oxygen atom picks up 2 hydrogen ions from the solution and forms water

13
Q

FADH2

A

gives electrons to ETC at a lower level than NADH