Digestion (AQA GCSE Biology): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
ShowHide
Practise the questions
12 questions from this quiz
What do qualitative tests tell us?
What do qualitative tests tell us?
If a substance is present
Which reagent is used to test for reducing sugars?
Which reagent is used to test for reducing sugars?
Benedict's solution
What colour does iodine turn if starch is present?
What colour does iodine turn if starch is present?
Blue-black
What colour does Biuret reagent turn if proteins are present?
What colour does Biuret reagent turn if proteins are present?
Pink or purple
What is the initial colour of Benedict's solution?
What is the initial colour of Benedict's solution?
Blue
What happens in a positive Sudan III test for lipids?
What happens in a positive Sudan III test for lipids?
A red upper layer forms
How long should Benedict's test be heated in a hot water bath?
How long should Benedict's test be heated in a hot water bath?
5 minutes
How much distilled water is mixed with food samples for preparation?
How much distilled water is mixed with food samples for preparation?
About
Which reagent tests for starch?
Which reagent tests for starch?
Iodine solution
Which reagent tests for proteins?
Which reagent tests for proteins?
Biuret reagent
What important safety property does ethanol have?
What important safety property does ethanol have?
Highly flammable
Why do we test food?
Why do we test food?
To identify nutritional value