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EFFECT OF THE AMOUNT OF PROTEASE ON THE SETTING OF JELLY Done By: Leow Wei Sheng 2P315

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Page 1: Science Experiment 1

EFFECT OF THE AMOUNT OF PROTEASE ON THE SETTING OF

JELLY

Done By: Leow Wei Sheng 2P315

Page 2: Science Experiment 1

CONTENT

Hypothesis Materials used Method Results Explanation Conclusion Reflection

Page 3: Science Experiment 1

HYPOTHESIS

The jelly containing apple dices set while the jelly containing kiwi dices does not set

Page 4: Science Experiment 1

WHY APPLE AND KIWI?

Apple is used to represent fruits with very little protease in them while kiwi is used to represent fruits with lots of protease in them

Page 5: Science Experiment 1

MATERIALS USED

Jelly powder Sugar Water Sliced apple dices Sliced kiwi dices Three containers

Page 6: Science Experiment 1

METHOD

1) Add jelly powder and sugar to water and boil the water to make the jelly

2) Put fruit slices in different containers of jelly, but leave one container without fruit slices to act as a control

3) Leave in refrigerator for one hour to set4) Take out the containers and observe the

jelly

Page 7: Science Experiment 1

RESULTS

The jelly containing apple dices set but the jelly containing kiwi dices did not set

Page 8: Science Experiment 1

EXPLANATION

Jelly is made up of long thin protein molecules that tangle up as they cool, creating a tangle that traps the water and makes a flexible solid

Kiwi contains lots of actinidin, a type of enzyme The enzyme is a protease, which chops up protein

molecules Apple contains very little protease, so less

proteins will be chopped up When the proteases are mixed with gelatin, the

proteases chop up the gelatin protein into pieces and make them too short to tangle, making the jelly unable to set

Page 9: Science Experiment 1

CONCLUSION

The jelly containing apple dices set as there are less proteases in the fruit to chop up the gelatin proteins

The jelly containing kiwi dices did not set as there are a lot of proteases in the fruit to chop up a lot of the gelatin proteins

Page 10: Science Experiment 1

REFLECTION

After doing this experiment, I found out how jelly are formed and the effect of different fruits on jelly. Doing this experiment also taught me how to make my own jelly, letting me eat jelly whenever I want. I also learnt how to manage time better, as I had to manage between this experiment and school work, especially when this time is an examination period and I also had to study.

Page 11: Science Experiment 1

Thank You!