lab report on pineapple and jello

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Enzymes in Pineapple

Enzymes are very efficient catalysts for biochemical reactions. They speed up reactions by providing an alternative reaction pathway of lower activation energy. Like all catalysts, enzymes take part in the reaction - that is how they provide an alternative reaction pathway. But they do not undergo permanent changes and so remain unchanged at the end of the reaction. They can only alter the rate of reaction, not the position of the equilibrium. Enzymes are usually highly selective, catalyzing specific reactions only. This specificity is due to the shapes of the enzyme molecules.
Pineapple’s lush, tropical sweetness is reason enough to enjoy it any way you can, but this fruit also contains
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About one quarter of all the protein in your body is collagen. It is a major structural material that forms molecular cables to strengthen the tendons and resilient sheets that support the skin and internal organs. Bones and teeth are made by adding mineral crystals to collagen. Collagen provides structure to our bodies, protecting and supporting the softer tissues and connecting them with the skeleton. But, in spite of its critical function in the body, collagen is a relatively simple protein.

Collagen from livestock animals is a familiar ingredient in cooking. Collagen is a protein, and like most proteins, when heated, it loses all of its structure. The polymer molecule unwinds. Then, when the denatured mass cools down, it soaks up all of the surrounding water like a sponge, forming gelatin.

Lab 1 Objective:
What form of pineapple juice contains enzymes that digest protein?

For every 3 groups For each group For entire class
1 envelope Knox gelatin 4 test tubes water
Measuring cup 1 test tube rack pineapple juices (below)
1 spoon 4(1ml) disposable pipettes hot plate to heat H2O
100ml graduated cylinder 10ml graduated cylinder Marking pen

1. Number and label the test tubes “1-4” and use the initials of a group member to identify your group.
2. Find 2 other groups and prepare 1 package of gelatin in the

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