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The Effect Of Different Sugar Sources On Yeast Respiration

726 words - 3 pages

The purpose of this investigation is to test the effect of different sugar sources on yeast respiration.
Yeasts are unicellular organisms belonging to the fungi kingdom and Eukarya Domain. Yeast are heterotrophs which gain its energy from enzymes that break down carbohydrates into alcohol and CO2. It can also derive energy from simple sugars such as fructose and glucose, which can be found mostly in groups and reproduce asexually (occasionally sexually). Asexual yeast reproduction is accomplished through a process called budding. Budding occurs when a yeast cell achieves full growth. It then sprouts a bud like swelling on its surface. Part of the parent cell’s nucleus is taken and put into ...view middle of the document...

Synthetic sugar substitutes are also called artificial sweeteners and are found most commonly in house hold food items and food preparation. Sugar substitutes provide less energy than carbohydrates (natural sugar), causing organisms that use sugar substitutes to move slower, more “sluggish.”
All living organisms use cellular respiration. It refers to the process of harvesting chemical energy (ATP) from organic molecules (food) into a form immediately usable by organisms. This process is happening all the time in the cytoplasm and mitochondria. The following equation is used during cellular respiration:
C6H12O6 + 6O2 → 6CO2 + 6 H2O + 36 ATP
There are two types of cellular respiration, aerobic and anaerobic. Aerobic respiration occurs when there is oxygen present and in the mitochondria (in eukaryotic cells) and the cytoplasm (in prokaryotic cells). Aerobic respiration requires oxygen; it proceeds through the Krebs cycle. The Krebs cycle is a cycle of producing carbon dioxide and water as waste products, and converting ADP to thirty-four ATPs. Anaerobic respiration is known as a process called fermentation. It occurs in the cytoplasm and molecules do not enter the mitochondria for further breakdown. This process helps to produce alcohol in yeast and plants, and lactate in animals. Only two ATPs are produced...

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