Required Practical: Food Tests (AQA GCSE Biology Combined Science): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What colour change indicates a positive Benedict's test for reducing sugars?
What colour change indicates a positive Benedict's test for reducing sugars?
Blue to brick-red or orange
What is the positive result for the iodine test for starch?
What is the positive result for the iodine test for starch?
Brown to blue-black colour change
What colour change shows a positive Biuret test for protein?
What colour change shows a positive Biuret test for protein?
Blue to purple
What is the positive result for the emulsion test for lipids?
What is the positive result for the emulsion test for lipids?
A cloudy white emulsion forms
What temperature should the water bath be for Benedict's test?
What temperature should the water bath be for Benedict's test?
Around 75°C
How long should the test tube be heated in Benedict's test?
How long should the test tube be heated in Benedict's test?
5 minutes
What type of nutrient does Benedict's test detect?
What type of nutrient does Benedict's test detect?
Reducing sugars
Which nutrient is detected using iodine solution?
Which nutrient is detected using iodine solution?
Starch
Why must ethanol be handled carefully during the lipid test?
Why must ethanol be handled carefully during the lipid test?
It is highly flammable
How much Benedict's solution should be added to the food sample?
How much Benedict's solution should be added to the food sample?
2-3 cm³