Temperature's Effect on the Production of Oxygen From Yeast and Hydrogen Peroxide

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Temperature's Effect on the Production of Oxygen From Yeast and Hydrogen Peroxide Planning

Aim

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My aim is to discover how temperature effects the production of oxygen

from yeast and hydrogen peroxide. I will mix yeast with hydrogen

peroxide and use an upturned measuring cylinder to measure how much

oxygen is produced. To find out how much hydrogen peroxide and yeast I

will use, I will carry out pre-tests. This will also aid accuracy of

the final experiment by uncovering potential flaws in the method.

Hypothesis and Theory

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There are many ideas to suggest that the change in temperature will

cause an increase of respiration in yeast. Yeast is a single cell

fungus made up mostly of protein, which has been use for its

applications in fermentation. Yeast, after activation creates the

ferments carbon dioxide and ethyl alcohol by secreting the enzyme

zymase (a complex of 12 enzymes) in the yeast, which acts on simple

sugars such as glucose. The alcohol produced has been used in making

wines and bears and the carbon dioxide produced has been used in

baking as it gets trapped in the dough and causes it to rise.

Enzymes are catalysts which speed up reactions, they are made from

protein and are specific as to which substrate they work on. Enzymes

basically work due to the lock and key theory, where the substrate

substance (the key) fits into the active site on the enzyme and they

bind together, the reaction takes place and the substrate unlocks to

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