Electron Transport Chain

Question 1

ETC is located on the

Answer 1

inner mitochondrial membrane

Question 2

Main source of energy in the aerobic pathway of energy generation

Answer 2

Electron Transport Chain

Question 3

Krebs Cycle
Beta oxidation
Occur in

Answer 3

Matrix of mitochondria

Question 4

Movement of electrons generate energy utilized to pump H ions into the

Answer 4

Intermembrane space from the matrix of mitochondria

Question 5

Higher concentration of ions is generated in the intermembrane space compared to the inner membrane space make it

Answer 5

Positively charged and generates electro-chemical gradient

Question 6

This enzyme transports H ions into the matrix of mitochondria and uses energy generated from flow of H ions to phosphorylate ADP to ATP

Answer 6

ATP Synthase

Question 7

Complex I

Answer 7

NADH Dehydrogenase Complex

NADH oxidoreductase

Question 8

L shaped complex in the inner mitchondrial membrane

Answer 8

Complex I NADH Dehydrogenase

Question 9

The vertical arm of complex I is located inside the

Answer 9

Inner mitochondrial membrane

Question 10

The horizontal arm of complex I is located in the

Answer 10

Matrix of mitochondria

Question 11

Complex I functions by

Answer 11

Removing hydrogen from reduced form of NAD

Question 12

NADH Dehydrogenase also contains complexes:

Answer 12

FMN

Iron-sulfur compounds

Question 13

Dehydrogenation is an example of this type of reduction

Answer 13

Oxido-reduction

Question 14

Complex II

Answer 14

Succinate dehydrogenase Complex

Question 15

Complex II removes H from succinyl and oxidizes it into

Answer 15

Fumarate

Krebs cycle

Question 16

Complex II is also called a complex because it contains

Answer 16

Iron-sulfur clusters

Succinate dehydrogenase

Question 17

Oxidation of succinate to fumarate produces a reducing equivalent of

Answer 17

FADH2 utilized to transport electron to Complex III

Question 18

Complex III

Answer 18

Cytochrome reductase

Q-cytochrome C Oxidoreductase

Question 19

Group of proteins with heme as complexes or prosthetic groups and iron cores where it can exist in an oxidized or reduced form

Answer 19

Cytochrome

Question 20

Complex III contains 3 types of cytochromes:

Answer 20

Cytochrome b
Cytochrome C1
Cytochrome C

Question 21

The cytochrome component of complex III that transfers it to Complex IV

Answer 21

Cytochrome C

Question 22

Complex IV

Answer 22

Cytochrome C oxidase

Question 23

A heme and copper containing complex whose main job is to oxidize cytochrome C or receive electrons and use it for the reduction of oxygen to water

Answer 23

Cytochrome C oxidase

Question 24

ETC begins when NADH donates its first electron to the first complex and are received by the prosthetic groups

The electrons are then received by

This is a type of reaction called

Answer 24

FMN

Iron-sulfur Fe-S proteins

Redox

Ferrous-Ferric

Question 25

Fe-S proteins donate electrons to

Answer 25

Co-enzyme Q

Question 26

Ubiquinone freely permeable molecule inside the inner mitochondrial membrane

Answer 26

Coenzyme Q Redox

Question 27

The first two redox reactions in complex I and complex II are used to generate energy to pump

Answer 27

4 H ions from matrix to inner membrane space

Question 28

2 H ions from the matrix combine with Coenzyme q and gets converted to

Answer 28

Reduced form of ubiquinone

Question 29

The second complex contains this enzyme which catalyzes the conversion of succinate to fumarate in Krebs (redox) causing generation of

Answer 29

Succinate dehydrogenase FADH2

Question 30

FADH2 stays inside complex II and donates electrons to Fe-S. The electrons are then transferred to

Answer 30

Ubiquinone

Question 31

Freely permeable molecule used to transfer electron to third complex

Answer 31

Ubiquinone

Question 32

In complex III, the electrons are first received by

Answer 32

cytochrome C1

Question 33

Cytochrome C1 transfers electrons to

Answer 33

Fe-S proteins donating electrons to cytochrome b

Question 34

Cytochrome b transfers electrons to cytochrome C which is used to donate electrons to

Answer 34

Complex IV

Question 35

Redox reactions inside complex III cause

Answer 35

pumping of 4 H ions to intermembrane space

Question 36

Complex IV receives electrons from cytochrome C via

Answer 36

Copper ions (a type?) then donate to cytochrome A and transfers electrons to copper ions (b type)

Question 37

Copper ions b type transfer electrons to

Answer 37

Cytochrome A3

Question 38

Cytochrome A3 transfers electrons to final electron acceptor which is:

Answer 38

oxygen

Question 39

Oxygen combines with 2 molecules of H and get reduced to become:

Answer 39

water

Question 40

Redox reactions in complex IV cause pumping of

Answer 40

2 H ions to intermembrane space

Question 41

All the pumping of H ions to intermembrane space cause

Answer 41

High concentration creating electro-chemical gradient used by ATP synthase to phosphorylate ATP from ADP

Question 42

Glucose -> Pyruvate (Glycolysis) Net of ATP? Net of NADH? Total of?

Answer 42

2 ATPs | 2 NADH

Question 43

Pyruvate -> Acetyl Coa Net NADH?

Answer 43

2 NADH

Question 44

Krebs Cycle (1 by glucose) Net GTP? Net NADH? Net FADH2?

Answer 44

2 GTPS 6 NADH 2 FADH2

Question 45

ETC Net NADH? Net FADH2?

Answer 45

``` 2 NADH (Glycolysis) = 5 ATP 2 NADH (Pyruvate -> Acetyl Coa) = 5 ATP 6 NADH (Krebs) = 15 ATP 2 FADH2 (Krebs) = 3 ATP ```

Question 46

In the Electron Transport Chain, for every 4 H ions that flow through ATP synthase, how many ATP is generated?

Answer 46

1 ATP

Question 47

1 NADH = | how many H ions?

Answer 47

10 H ions | Giving rise to 2.5 ATPs

Question 48

1 NADH = ATPs?

Answer 48

2.5 ATPs

Question 49

1 FADH2 = H?

Answer 49

6 H ions | Generating 1.5 ATPs

Question 50

1 FADH2 = ATP?

Answer 50

1.5 ATP

Question 51

Glucose -> Pyruvate Net ATP?

Answer 51

7 ATP

Question 52

Pyruvate -> Acetyl Coa Net ATP?

Answer 52

5 ATP

Question 53

Krebs Cycle Net ATP?

Answer 53

20 ATP

Question 54

Glycolysis Pyruvate to Acetyl CoA Krebs ETC Total ATP yield:

Answer 54

32 ATPs