https://www.khanacademy.org/science/biology/cellular-respiration-and-fermentation/variations-on-cellular-respiration/v/alcohol-or-ethanol-fermentation 2024-05-06T19:22:43.24334365Z Alcohol or ethanol fermentation Glycolysis breaks down glucose into two pyruvate molecules, producing ATP and reducing NAD+ to NADH. When oxygen isn't available, organisms can use lactic acid fermentation or alcohol fermentation to recycle NADH back to NAD+. In alcohol fermentation, pyruvate loses a carboxyl group, becoming acetaldehyde, which is then reduced to ethanol. This process, performed by yeast, is used in bread and alcohol production. Sal Khan video https://cdn.kastatic.org/googleusercontent/pR2VtcNHkVg3tb_6_Rl4mqLdQFidFQB-Zrep_eo2OPr5n9FsOTNJLmYHc1mjY86aahHmzclGbh_CfHbStbPi8cer Alcohol or ethanol fermentation Glycolysis breaks down glucose into two pyruvate molecules, producing ATP and reducing NAD+ to NADH. When oxygen isn't available, organisms can use lactic acid fermentation or alcohol fermentation to recycle NADH back to NAD+. In alcohol fermentation, pyruvate loses a carboxyl group, becoming acetaldehyde, which is then reduced to ethanol. This process, performed by yeast, is used in bread and alcohol production. https://cdn.kastatic.org/ka-youtube-converted/D6mRPgvAEOc.mp4/D6mRPgvAEOc.mp4 383 Biotechnology https://www.khanacademy.org/science/cambridge-o-level-biology-cie/x2a084a90105205d2:biotechnology-and-genetic-modification/x2a084a90105205d2:biotechnology/a/bioreactors-and-downstream-processing 2021-07-14T15:09:48Z Bioreactors and downstream processing Large-scale production and purification of recombinant proteins using bioreactors. article