Answer Happy

Please answer the following question. Don't need explanations
unless the question explicitly asks for it! I appreciate your help
in advance!
i) Complex I (NADH:ubiquinone oxidoreductase) and complex
IlI (coenzyme Q : cytochrome c - oxidoreductase) each contain a
2Fe-2S iron sulfur cluster. However, the iron sulfur clusters have
very distinct standard reduction potentials (E°).
Which iron sulfur cluster can be expected to have a
more positive standard reduction potential, 2Fe-2S in complex
l or 2Fe-2S in complex II?
ii) Briefly explain how it is possible for these 2Fe-2S
iron sulfur clusters to have different E° values even though they
have the same molecule structure?
iii) The disease _______ is caused by single amino acid
mutation in the beta globin chain of hemoglobin and causes the
protein to aggregate.
iv) Resting individuals have high ATP concentrations in
their mitochondrial matrix. How would you expect elevated ATP
levels to effect the concentrations of the following
metabolites?
NADH = increase or decrease
ADP = increase or decrease
Citrate = increase or decrease