Oxidative Phosphoryaltion Flashcards
1
Q
Where does oxidative phosphorylation
A
- Reduced NAD and FAD oxidised to release H atoms which split into protons and electrons
- electron transfer chain - loosing energy as it goes down
- energy released by electrons used to produce ATP
-chemiosmotic theory - oxygen is the final electron acceptor
- produces water as a by product
2
Q
Chemiosmotic theory
A
- Energy used by electron carriers to actively transport protons from matrix
- protons diffuse into matrix down an electrochemical gradient via ATP synthase
- releasing energy to synthesise ATP from ADP + PI
3
Q
Benefit of ETC rather than single reaction
A
- energy is released gradually
- ls energy is released as heat
4
Q
2 other molecule that can be used as alternative respiratory substrates
A
Amino acids from proteins
Glycerol and fatty acids from lipids
5
Q
How can lipids act as an alternative respiratory substrate
A
- Fatty acids from the hydrolysis of lipids are converted to acetyl coenzyme A
- enters Krebs cycle
6
Q
How can amino acids be used as respiratory substrates
A
Amino acids from the hydrolysis of proteins are converted to intermediates in Krebs cycle