Enzymes, Food Tests Flashcards
1
Q
What is an enzyme and what happens when it’s denatured
A
Biological catalyst. Made of amino acids. Denatured - lost its shape/ structure so can’t form enzyme substrate complexes
2
Q
What enzyme breaks down protein?
A
Protease
3
Q
What enzyme breaks down fats
A
Lipase
4
Q
What enzyme breaks down carbohydrates?
A
Amylase
5
Q
Test for sugars, basic method and colour change
A
Benedict’s solution. Add a few drops of Benedict’s, heat/ heat in water bath -green to brick red positive
6
Q
Test for starch, basic method, colour change
A
Iodine, drop of iodine, browny yellow to blue/black if positive
7
Q
Test for protein , method , colour
A
Biuret solution, add 5-10 drops, blue to purple
8
Q
Test for lipids/fats
A
Ethanol solution, add 3 drops shake, turns cloudy
