Carbohydrates Flashcards
How do u test for starch
Iodine
What is a positive result for starch?
Changes from yellow to blue black
What is a positive result for reducing sugars ?
It changes red depending on the concentration
What is used to test for reducing sugars ?
Benedicts solution
What are reducing sugars ?
Ones with the ability to donate electrons
What are the issues with Benedicts test?
- non specific
- the test is qualitive
- it is subjective
What does a non specific result mean ?
We can not obtain a value or concentration of reducing sugar
What can be used to test for specific sugars ?
A biosensor
What does a biosensor do ?
Tests for specific sugars
When can acolour meter be used ?
To quantify results
What are the two isomers of glucose ?
Alpha and beta
What are all carbohydrates composed of ?
Carbon
Hydrogen
Oxygen
What forms maltose ?
The condensation of two glucose molecules
What forms sucrose ?
The condensation of glucose and fructose
How is lactose formed ?
By the condensation of glucose and galactose
