Bioenergetics [ETC + summary] Flashcards Preview

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Flashcards in Bioenergetics [ETC + summary] Deck (20)
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1
Q

Etc inputs

A

10NADH
2FADH2
6O2

2
Q

ETC outputs

A

10NAD+
2FAD
12H2O

3
Q

Where does ETC occur?

A

Inner membrane

4
Q
Complex 1 
Name:
Description:
H+ transferred:
Pump?:
A
Complex 1 
Name: NADH oxidase
Description: converts NADH —> NAD+. FMN sends e- flying down a wire of Fe-S, out and into Q.
H+ transferred: 4 (+ 2 at end?)
Pump?: Yes
5
Q
Complex 2 
Name:
Description:
H+: 
Pump?:
A
Complex 2 
Name: Succinate Q reductase
Description: FADH2 —> FAD. electrons sent to Q.
H+: none
Pump?: no
6
Q
Complex 3
Name: 
Description: 
H+: 
Pump?:
A
Complex 3
Name: 3 Cyt b-C1
Description: Electrons come in from Q, to Cyt-b —> Fe-S —> Cyt-C. Then sent to cyt-C carrier.
H+: 4
Pump?: No
7
Q
Complex 4 
Name: 
Description:
H+:
Pump?:
A
Complex 4 
Name: 4 Cyt-C oxidase. 
Description: electrons from cyt-c carrier. Cyta —> Cyta3. The 2H transferred + 0.5O2 are used to make water.
H+: 2
Pump?: yes
8
Q

How many more electrons do NADH move than FADH2.

A

4

9
Q

Name the two types of super complexes and how many protons they transfer

A

Complex 1,3,4
- 10 H

Complex 2,3,4
- 6 H

10
Q

What poisons affect complex 1?

A

Rotenone and anaesthetics

11
Q

What poisons affect complex 3

A

Antimycin (blocks Q cycle)

12
Q

What poisons affect complex 4

A

Cyanide / O2 (binds to Fe heme)

13
Q

Name the 4 parts of the ATP synthase

A

Strator
Rotor
Internal rod
Catalytic knob

14
Q

Path of H+ in ATP synthase

A

Strator
One turn in rotor
2nd strator
Matrix

15
Q

How does the internal rod interact with the catalytic knob?

A

Rod spins inside rod, pushing subunits in the knob as it stays still. The spinning activates sites in the knob which makes ATP. Rod is not straight.

16
Q

Features of the malate shuttle to bring FADH2 and NADH into the ETC. ATP? Speed? Complicated or not? How efficient?

A

2.5ATP
slow
Complicated
Efficient

17
Q

Features of the G3PDH shuttle to bring FADH2 and NADH into the ETC. ATP? Speed? Complicated or not? How efficient?

A

1.5ATP
Less efficient due to FADH2 use
Fast

18
Q

Cause of Leigh’s disease

A

Mutation in C ring of ATP synthase

19
Q

Symptoms of Leigh’s disease

A

?

20
Q

Describe Cyt-C structure and how it transfers electrons

A

It binds to an electron becoming reduced, then oxidizes and changes colour. It’s absorbance changes.