How Temperature Affects the Rate of Respiration in Yeast Cells

How temperature influences yeast cell respiratory rate Objective: The purpose of this study was to understand how temperature influences yeast cell respiration rate. [IMAGE] Equipment: The equipment I use is as follows: * Measuring cylinder (10 cm 3 and 50 cm 3) [IMAGE] * Test tube * [IMAGE] Distilled water * [IMAGE] Glucose solution (0.5 g to 1.0 g ) * Yeast suspension (0.5 g - 1.0 g) [IMAGE] * Water bath (electronic) [IMAGE] * [IMAGE] Test tube rack * Gas ​​injector (200 ml) * Stop clock [IMAGE] [IMAGE] Method: Preliminary Research,

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 glycosidic bond is the two glucose subunits of maltose. The disruption of this combination slows the proportion of carbon dioxide to the disaccharide produced by yeast respiration compared to monosaccharides.

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.

Cells acquire energy through a process called breathing. Yeast usually breathes under aerobic conditions. In the absence of oxygen, yeast undergoes anaerobic respiration. The yeast undergoes alcohol fermentation, which is catalyzed by the enzyme zymase to produce ethanol, carbon dioxide and energy. Ethanol is used to make wine. Based on this figure, the experimental curve with 4 ml yeast suspension was more steep than the experimental curve with 2 ml yeast suspension. It can be concluded that as the amount of yeast suspension increases, the amount of carbon dioxide produced also increases. The use of large amounts of yeast suspension increases reactants and consequently collision frequency increases. Therefore, more productive collisions will occur and products emitting carbon dioxide will increase. The results are accurate because the measurements are close to each other in both experiments.