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Summary

The presence of alcohol in an aerated external medium increases the respiration rate of carrot discs. If the alcohol is labelled no labelling appears in the CO2 emitted or the acids formed in the tissue. Alcohol dehydrogenase is shown to be located almost wholly among the soluble proteins of the cytoplasm. The failure to oxidize alcohol is attributed to its spatial separation from the terminal oxidase system located in the mitochondria.