MICB 201 Lecture Notes - Lecture 17: Acetobacter, Catabolism, Chemical Polarity
Document Summary
Respiration of energy sources containing n and s: most enzymes that transfer electrons from an organic energy source to nad+ do not do so from n/s containing molecules. If organic energy source contains n or s, n and s are removed before electrons transferred to nad: s- and n-containing waste products produced: differ between organisms. 2 (in urine: both nh3 and h2s are toxic, harder for a multicellular organism to readily dispose of them so they are first converted to less/nontoxic forms. Example: acetobacter sp. the bacteria that are used to make vinegar (= dilute acetic acid) from ethanol. Ch3choh (energy source; nutrient = ethanol) ch3cooh (waste = acetic acid: not all ethanol-c oxidized to co2-c = incomplete oxidation of c. Making atp: fermentation: all atp is made by slp, electrons removed from c of the energy source are returned to c atoms derived from the energy source.
