Category: Cellular biology
Glycolysis is the beginning of the process of extracting usable energy from food. The disposal of the products of glycolysis when there is no oxygen available is the process of fermentation.
The simple sugar glucose is generally considered the starting point for looking at glycolysis and fermentation. Glucose is a simple carbohydrate, consisting of carbon, hydrogen, and oxygen. Most glucose is produced by plants; organisms that cannot photosynthesize must obtain glucose (or more complex carbohydrates) from their surroundings. Animals obtain food molecules by eating. Simpler forms of life, such as bacteria and yeast, simply absorb their food from their environment.
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