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... Low levels of NAD+ slow the rate of glycolysis, an important pathway for organisms to ferment sugars. It must also have the proper enzymes capable of breaking the bonds of sugar molecule because each enzymes are made specifically for a specific reaction. ...
In this lab we are trying to determine whether yeast, like most other eukaryotic cells, is capable of metabolizing three types of sugars: glucose, sucrose, and lactose. Yeast, which is microscopic fungus, will send certain enzyme to obtain their energy from fermentation. We will have yeast ferment sugars anaerobically, without oxygen. When yeast ferments the sugars anaerobically, however, CO2 production will cause a change in the pressure of a closed test tube, since no oxygen is being consumed. ... A gas pressure sensor released will be used to monitor the fermentation of sugar.
I hypothesis all three of the sugars will be ferment by yeast. Yeast will find a way to ferment sugar because yeast break down sugar molecule, allowing the cell to sustain usable energy. In the absence of oxygen, yeast will switch to an alternative pathway that does not require oxygen. Glucose will be the fastest to ferment because glucose is a simply sugar with a low energy yield of only about 2 adenosine triphosphate (ATP) per mole of glucose metabolized. Sucrose will be the second sugar to be ferment because enzymes will break down the sucrose, table sugar, into the simpler glucose and fructose.
Approximate Word count = 1077
Approximate Pages = 4.3
(250 words per page double spaced)
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