Biology Essay

650 words - 3 pages

Introduction

Catalysts help speed up reactions. Catalysts come from a certain molecular substance found in cells. These are called enzymes. Enzymes would temporarily bond to one or more reactants of a reaction and catalyze, meaning they speed up the process with lower activation energy needed. Enzymes provide a variety of functions such as cells using an enzyme to rid themselves of a poisonous substance (hydrogen peroxide) and also energy usage.

catalase
2H2O(l) ( 2H2O(l) + O2(g)

This lab measured the time it took for a disc of filter paper soaked with different concentrations of enzyme to make its way to the surface of the test tube containing peroxide.

The ...view middle of the document...

80 |4.53 |4.67 |
|0 |0.00 |0.00 |0.00 |

Referring to the data recorded on Part II, the fastest reaction time was with 80% of H2O2. While 0% of H2O2 had the slowest time.

Part II : effect of substrate concentration
|% of H2O2 |Group 1 |Group 2 |Average |
|100 |6.57 |6.46 |6.52 |
|80 |8.08 |5.37 |6.73 |
|60 |6.20 |4.30 |5.25 |
|40 |6.80 |6.29 |6.55 |
|20 |4.50 |3.17 |3.84 |
|0 |0.00 |0.00 |0.00 |

Part III shows that at 37(C, the reaction rate was fastest. It also shows that at 100(C, the reaction was the slowest.

Part III : effect of Temperature
| | |Reaction rate (mm/s) | |
|Temerature |group 1 |Group 2 |Average |
|0 |6.39 |7.10 |6.75 |
|22 |5.46 |7.40 ...

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