Tuesday, 26 September 2017

biochemistry - What is the source of the electrons generated in the Krebs cycle?


In the Krebs cycle, where do the hydrogens and electrons that NAD+ and FAD accept come from? It seems that citric acid only loses two hydrogens because it starts out with eight hydrogens and then becomes oxaloacetic acid, which has four hydrogens.




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evolution - Are there any multicellular forms of life which exist without consuming other forms of life in some manner?

The title is the question. If additional specificity is needed I will add clarification here. Are there any multicellular forms of life whic...