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Intro. to Food lab - shaunab.infoshaunab.info/Biology/Biology_Labs/chap 4/Intro. to Food lab.pdf · for the presence of nutrients. Detection is based upon ... Proteins Biuret Reagent

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Intro to Identifying Biological Molecules

in Food Lab Pleaseexcusethecorninmyteeth.
MoreInformationonReducingsugars:
ComplexCarbohydratesstarches
Lugols(Iodine)TestsforStarchDont forget to tap the test tubes!
LipidsTriglycerides
SudanIVTestforLipids
Positive

Dont forget to tap the test tubes!
BrownPaperBagTestforLipids

Intheprocessofdrying

Afterdrying
Dont forget to tap the test tubes!
ProteinsPolypeptidesarechainsofaminoacidsheldtogetherbypeptidebonds
Positive

PURPLECOLORCHANGE
BiuretTestsforProteinsDont forget to tap the test tubes!

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