Ethanol Fermentation Glucose Vs. Fructose Essay

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To better understand the definition and process of fermentation it is helpful to understand the actual purpose as well as the different components that make up the process. Cellular respiration is a series of metabolic reactions and processes that take place in the cells of organisms where biochemical energy from nutrients is converted into adenosine triphosphate (NCS Pearson, 2016). In respiration, catabolic reactions cause large molecules to break into smaller ones, which releases useful energy that cells gain to fuel cellular activity through respiration. The two types of respiration are aerobic, with oxygen, and anaerobic, without oxygen. Aerobic respiration has three stages: glycolysis, TCA cycle, also known as Kreb’s cycle or Citric acid cycle, and electron transport chain. Anaerobic respiration has two stages: glycolysis and fermentation, or NAD+ regeneration. Fermentation can be defined as a biochemical reaction where, in yeast, enzymes catalyze the conversion of sugars to alcohol or acetic acid with the evolution of carbon dioxide (Boundless, 2016). Fermentation is a necessary process for anaerobic organisms to produce energy. The purpose of alcohol fermentation in yeast basically happens for the same purpose that lactate fermentation happens in animals and bacteria; to replenish the supply of NAD+ because NAD+ is a physical requirement of glycolysis (Chemistry LibreTexts, 2013).
Yeast is a microscopic

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