Oxidative Phosphoryaltion

Question 1

Where does oxidative phosphorylation

Answer 1

• 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

Question 2

Chemiosmotic theory

Answer 2

• 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

Question 3

Benefit of ETC rather than single reaction

Answer 3

• energy is released gradually
• ls energy is released as heat

Question 4

2 other molecule that can be used as alternative respiratory substrates

Answer 4

Amino acids from proteins
Glycerol and fatty acids from lipids

Question 5

How can lipids act as an alternative respiratory substrate

Answer 5

• Fatty acids from the hydrolysis of lipids are converted to acetyl coenzyme A
• enters Krebs cycle

Question 6

How can amino acids be used as respiratory substrates

Answer 6

Amino acids from the hydrolysis of proteins are converted to intermediates in Krebs cycle