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Khan Academy 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
An introduction to cellular respiration (article) | Khan Academy In summary, glycolysis begins to break down glucose and releases energy, which is stored in ATP and NADH Then, in the citric acid cycle, pyruvic acid is broken down to produce carbon dioxide, ATP, NADH, and FADH 2
Oxidative phosphorylation | Biology (article) | Khan Academy 30-32 ATP from the breakdown of one glucose molecule is a high-end estimate, and the real yield may be lower For instance, some intermediates from cellular respiration may be siphoned off by the cell and used in other biosynthetic pathways, reducing the number of ATP produced
Alcohol or ethanol fermentation (video) | Khan Academy 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+
Steps of cellular respiration | Biology (article) | Khan Academy Cellular respiration is a metabolic pathway that breaks down glucose and produces ATP The stages of cellular respiration include glycolysis, pyruvate oxidation, the citric acid or Krebs cycle, and oxidative phosphorylation
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