Electron Transport

Front 1

purpose of the electron transport

Back 1

to get energy out of reduced coenzymes

Front 2

only a small amount of the energy from nutrient molecules is captured by ____. ATP in ___, GTP in ___

Back 2

substrate level phosphorylation
glycolysis, tca

Front 3

oxidative phosphorylation

Back 3

the electron transport chain uses oxygen coupled to phoshorylation

Front 4

substrate level phosphorylation

Back 4

uses high energy substrates

Front 5

"membrane process"

Back 5

proteins of the ETC are found embedded in the inner membrane

Front 6

each carrier undergoes ___ followed by ____. the final accepter is o2 when it gets __, forming H20

Back 6

reduction, oxidation
reduced

Front 7

oxidations
H atoms
hydride H

Back 7

invovlve the removal of H as either:
proton + e-
proton + 2e-

Front 8

** Flavin:
Nicotinic:

Back 8

** Flavin:2hs + 2es are released
Nicotinic: 2es but only 1 H+ - the remaining H+ is released as a proton

Front 9

E not prime

Back 9

is the standard redox potential at a ph of 7

Front 10

the change in free energy for the transfer of e's

Back 10

equation:



written as reductions

Front 11

H+s are being pumped from ___ to ___

Back 11

matrix out into the inner mitochondrial space
Low pH on the outside compared to matrix

Front 12

inner membrane contains:

Back 12

cristea - for atp synthesis

Front 13

flow of electrons based on standard redox potential

Back 13

NAD/NADH2
FMN/FMNH2
cyt c Fe 3/Fe 2
1/2 O2/H2o

Front 14

the more negative the delta E not is:

Back 14

the greater tendancy for the reduced form to dominate

Front 15

5 groups of carriers in the ETC:

Back 15

1. flavoproteins
2. ubiquinone-coenzyme Q
3. cytochromes (proteins)
4. iron-sulfur proteins
5. protein-bound Cu

Front 16

flavoproteins

Back 16

Flavin coenzymes are tightly bound to
the apoproteins
Involved in 1 or 2 electron transfer

Front 17

ubiquionine coenzyme

Back 17

Present in all biological systems A quinone with an isoprenoid tail
A hydrophobic molecule – moves in the
the membrane – a mobile e- carrier
Involved in 1 or 2 electron transfer

Front 18

cytochrome C (proteins)

Back 18

Contain heme: porphyrin ring + Fe
oxid/redu takes place in the heme
cyt c is soluble (free)
Fe2+ Fe3+
Involved in 1 electron transfer

Front 19

iron-sulfur proteins

Back 19

Contain Fe but not as heme
Several Fe atoms attached to cysteine
Fe2+ Fe3+
Involved in 1 electron transfer

Front 20

protein-bound Cu

Back 20

Associated with cyt a and cyt a3
Cu+ Cu2+
Involved in 1 electron transfer

Front 21

complex I
NADH:coQ reductase

Back 21

FMN and FES are intermediates
NADH is bound on the matrix side
reaction:






c

Front 22

complex 2:
succinate:CoQ reductase

Back 22

FAD and FES proteins
reaction:











c

Front 23

complex 3:
coQ:cytochrome C reductase

Back 23

includes: cytb, cytc1, FeS
reaction:









c

Front 24

complex 4:
cytochrome C oxidase

Back 24

cyta, cyta3, c oxidase
reaction:














c