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How Does Starch Break Down Into Sugar When Amylase

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In conclusion, the purpose of this lab is to discover if starch will break down into sugar when amylase is present. Amylase is an enzyme that breaks starch into sugar in the mouth. An enzyme is a protein that breaks down food. The hypothesis stated, if amylase is added to starch, then the amylase and starch solution will test positive for sugar and negative for starch because starch is broken down in the mouth first and it breaks down into sugar first. The hypothesis is correct because, in the lab, the starch was positive for sugar because starch and the amylase breaks down starch into sugar, but tested negative for starch because the starch is breaking down. In the lab, starch was mixed with ten drops of Benedict's and tested negative for sugar and the color changed to blue. …show more content…

When starch was mixed with three drops of Lugol’s, it tested positive for starch and the color changed to black. Lugol solution is a starch indicator. This happened because starch on its own can’t break down into sugar, so it stayed as a starch. When distilled water and amylase were mixed together, it tested negative for both, starch and sugar, and the color change for both, the sugar testing changed to blue and the starch test turned to yellow. This happened because in science distilled water is called a control which is not being tested but used for comparison. When amylase and starch were mixed together with three drops of Lugol’s, the testing for starch tested negative and there was a color change to yellow. This happened because, after starch and amylase were mixed along with ten drops of Benedict’s, the testing for sugar tested positive with a color change to

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