thanks for clearing it up, i remember now where i read about yeast - it was either used during cellular respiration or fermentation - i even checked my notes just to see what i missed. i apparently forgot about the conversion part, i guess i should have studied harder lol. but when you say its full of proteins/peptides/aminos - those are all related in the same organic molecule. peptide bonds are made from protein, and amino acids are the monomer of protein. but you already know that, good thing we have a bio major here.
i totally mixed up yeast and starch though, sorry about that. starch is what the plant stores for long term energy. like i said, im really stoned.