The Effect of Sugar Substitutes on Yeast Respiration

Introduction The purpose of this study was to test the effect of various carbohydrates on yeast respiration. When thinking about bread rising, cheese, alcoholic drinks and other foods, most people think about yeast. Other yeast bacteria may also cause yeast infections, ie skin infections. Saccharomyces is usually a small microorganism with an oval or circular membrane. They are unicellular fungi of Ascomycetes which processes sugar into alcohol and carbon dioxide (CO 2), this process is called fermentation.

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 in ATP 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.

Prediction: I think that the breath of yeast is affected by the size of sugar. Therefore, I think that carbon dioxide (carbon dioxide) produced by glucose (monosaccharide) is produced faster than glucose (monosaccharide) as compared with the proportion of carbon dioxide produced by maltose (disaccharide) . "Glucose is α-glucose with a hydroxyl group under the ring." Compared to the maltose structure, it can be seen that maltose can be regarded as "two glucose units that bind together in coagulation". However, comparing the maltose disaccharide to two separate alpha-glucose monosaccharides, "maltose has more binding than the two glucose monomers. The key between them" The destruction of this combination is a simple Slow down the proportion of carbon dioxide to disaccharide produced by yeast respiration compared to sugars.