B3.3 The Chemistry Of Food Organisation And The Digestive System Flashcards

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1
Q

What are the three different types of food ?

A

Carbohydrates, proteins and lipids

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2
Q

How Do we test for carbohydrates? Say both for starch and sugar

A

Starch- reagent iodine
if present colour changes from red to blue/ black
Sugar- reagent benidicts solution+ water Bath
turns blue- red

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3
Q

How do we test for proteins ? PB

A

Reagent- biuretagent
If present changes from blue to purple

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4
Q

How do we test for lipids ?

A

Reagent- ethanol
Colour change- cloudy layer if present

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