B1 - Food Tests And Enzymes Flashcards
What is the name of the chemical used to test for starch?
Iodine solution
What colour indicates a positive test for starch using iodine solution?
Blue / black
What chemical is used to test for sugar?
Benedicts
What colour indicates a positive test for sugar?
Brick red
What chemical is used to test for protein?
Biuret
What colour indicates a positive test for protein?
Lilac
Name the enzyme which breaks down starch
Amylase
Enzymes are often called
Biological catalyst
If an enzyme is denatured, the active site on the enzyme changes shape so that…
The substrate cannot bind
Name the enzyme which breaks down protein
Protease
What does the ‘optimum pH’ mean?
The pH where the rate of reaction is the fastest
Name the enzyme which breaks down fats
Lipase
During a reaction, an enzyme will break down the substrate to form…..
Products
What are lipids digested into?
Fatty acids and glycerol
What is starch broken down into?
Glucose
What is the product(s) of protein digestion?
Amino acids
An enzyme will bind to a substrate to form ….
Enzyme-substrate complex
What happens to enzymes when they get too hot?
The active site changes shape and becomes denatured
Name the region that a substrate binds to.
Active site
What is an enzyme made out of?
Protein