enzymes and food tests Flashcards
(16 cards)
What does the Sudan III food test test for? And what foods can you find this in?
Tests for: Fats
Can be found in oils, butters, avocados
What does the Biarets food test test for? And what foods can you find this in?
Test for Protein
Found in nuts, meat, milk
What does the iodine food test test for? And what foods can this be found in?
Tests for Starch
Found in crackers, potatoes
What does the Benedicts food test test for? And what foods can you find this in?
Tests for Sugars
Found in sweets, biscuits
what colour is the start and positive for the benedicts food test?
Starts: Blue
Positive: Red
What are the start and positive colours go the sudan III food test?
Start : Red
Positive : Red but floating
What are the start and positive colours for the Biarets food test?
Start : Pale blue
Positive : Lilac
What substrate works with the protease enzyme and what is its product?
Substrate : Protein
Product : Amino acid
What substrate works with the Amylase enzyme and what is its product?
substrate : Starch
Product : Glucose
What are the start and positive colours for the iodine food test?
start : black
positive : brown
What pH is needed for these enzymes?
- Protease
- Amylase
- Lipase
Protease : 2.5
Amylase : 7.5
Lipase : 7.5
When the temperature is high, what happens to an enzyme?
It changes shape and is no longer complementary for the substrate
it becomes DENATURED
Why does pH affect enzymes?
the pH affects the detailed structure of the active site
What does bile do?
it increases pH so that amylase and lipase can digest
where is bile produced?
Liver
Where is the bile stored?
gallbladder
