• Mitochondria (plenty of redox reactions (aka electron transfers))
  • Fatty acid oxidation (β-oxidation), acetyl-CoA production, TCA cycle, oxidative phosphorylation, ketogenesis.
• Cytoplasm (processes that build larger molecules)
  • Glycolysis, HMP shunt, and synthesis of cholesterol (SER), proteins (ribosomes, RER), fatty acids, and nucleotides.
• Both
  • Heme synthesis, urea cycle, gluconeogenesis. Hugs take two (both).