The Effect of Different Sugar Sources on Yeast Respiration

Since 2006, scientists have identified 1,500 yeasts. Yeast accounts for only 1 percent of the total fungal species in the fungus world. Yeast can be found anywhere in nature, above plants, in soil, and more generally in the body of humans and other animals. Yeasts are usually used for the production of alcohol (beer, wine, whiskey), yeast bread and cheese. Carbohydrates are major molecules in biological systems and are composed of sugars that can be attached in tandem to small molecules called disaccharides, trisaccharides and polysaccharides or sugars.

Fermentation is the decomposition of sugar by bacteria and yeast using anaerobic respiration (anaerobic respiration). It contains yeast cultures and sugar solutions that produce ethanol and carbon dioxide by enzymes. This is an 8 - 10 step process that requires different enzymes each time, but this can be simplified. All enzymes are protein chains of amino acids. They exist in the form of an alpha helix structure in which hydrogen bonds hold the pitch together. On the amino acid molecule there is the Ra group. They react with each other to form a peptide bond, which converts the chain into a three-dimensional structure. There is an active site along the chain where interaction occurs between the enzyme and the substrate. These parts are vulnerable to heat, like hydrogen bonds that bring together 3D molecules. When heat is added to the enzyme, energy is given to the molecule

Yeast synthesizes ATP through two major biochemical pathways: respiration and fermentation. During respiration and fermentation, yeast cells break down the intracellular glucose molecules and release energy (a process known as glycolysis), some of which are captured and stored by ATP's high energy phosphate bonds. The degradation of glucose also releases carbon atoms, which can be used to allow yeast to grow and proliferate through germination in biosynthetic reactions. The remaining carbon eventually falls into these reaction by-products, such as carbon dioxide, ethanol and other smaller compounds. Other fermentable sugars such as maltose are first converted to glucose (fructose, but possibly directly entering the glycolytic pathway) before entering these metabolic pathways.