Required Practical: Food Tests (AQA GCSE Biology): Flashcards

Reducing sugars

Blue to brick-red or orange

$75°C$ for $5$ minutes

$2$-$3$ $\text{cm}^3$

Starch

Brown to blue-black

Proteins

Blue to purple

Lipids

$2$ $\text{cm}^3$

Cloudy white emulsion

Red-stained oil layer on surface

Highly flammable