Chapter 20 (Electron Transport)

Question 1

The ___ electron pairs released during glucose oxidation are transferred to ___ and ___ rather than ___

Answer 1

12
NAD (10)
FAD (2)
O2

Question 2

Electron Transport

Answer 2

Electrons are carried to generate a proton gradient across the inner mitochondrial membrane

Question 3

Oxidative Phosphorylation

Answer 3

The protein gradient runs downhill to facilitate the synthesis of ATP

Question 4

The enzymes that are involved in electron transport and oxidative phosphorylation are bound to the ___

Answer 4

inner membrane

Question 5

The intermembrane space has a (high/low) [H+] and a (high/low) pH

Answer 5

High = Low

more acidic

Question 6

The mitochondrial matrix has a (high/low) [H+] and a (high/low) pH

Answer 6

Low = High

Question 7

Two lipid soluble coenzymes

Answer 7

UQ and CoQ

Question 8

Water soluble protein

Answer 8

Cyt c

Question 9

The protein complexes are ___ mobile within the inner membrane

Answer 9

laterally

Question 10

Electrons flow through the ETC components in the direction of (increasing/decreasing) reduction potentials

Answer 10

increasing

Question 11

The ETC (does/does not) synthesize ATP

Answer 11

does not
(translocates H+ for ATP synthesis later on)

Question 12

Complex I prosthetic groups

Answer 12

FMN

Fe-S

Question 13

Complex II prosthetic groups

Answer 13

FAD

Fe-S

Question 14

Complex III prosthetic groups

Answer 14

Heme bl
Heme bn
Heme c1
Fe-S

Question 15

Complex IV prosthetic groups

Answer 15

Heme a
Heme a3
Cu a
Cu b

Question 16

Transfers only 2e-

Answer 16

NAD/NADH

Question 17

Transferes only 1e-

Answer 17

Fe-S clusters (regardless of how many)

Cytochromes

Question 18

Transferes 1e- or 2e-

Answer 18

FMN/FMNH2
FAD/FADH2
CoQ/CoQH2

Question 19

CoQ10 shares a pathway with ___ synthesis and is used in ___ lowering drugs

Answer 19

cholesterol

Question 20

CoQ is a lipid soluble carrier because of the ___

Answer 20

isoprenoid units

Question 21

___ are heme containing proteins that can pick up 1e- at a time

Answer 21

Cytochromes