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Unformatted text preview: and allowed to sit for two minutes. Results: Macromolecules Present in Milk Test For Coloration of Positive Control Coloration of Negative Control Milk (+ or -) Red. Sugars Reddish Brown Blue + Starch Bluish Black Brownish-Proteins Purple Blue + Figure 1. Using detection reagents to determine the presence or absence of macromolecules in milk. Milk tested positive for both reducing sugars and proteins, but it tested negative for the presence of starch. Conclusion(s): Our hypothesis stating that reducing sugars and proteins are present in milk was supported by the positive result observed. However, our hypothesis stating the starch would also be present in milk was invalidated by our results. The obtained result could be due to either the absence of the macromolecule in milk, or an error committed while performing the steps of the protocol. Repetitions of this experiment could further elucidate the validity of both the positive and negative results obtained....
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- Fall '11