Welcome to the Quiz!

This quiz contains 8 questions from a mix of 1 subtopics.

Diagram showing the molecular structure of glucose.

Which test is used to detect the presence of reducing sugars (i.e. small sugars like glucose)?

Biuret test

Bartholomew's test

Benedict's test

Bronchial test

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Does the Benedict's test require heating the sample in a water bath? 

Yes

No

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What does iodine test for?

Lipids

Starch

Proteins 

Glycogen

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Iodine solution is used to test for the presence of starch. If starch is present, which colour change takes place?

Blue to brick red

Orange to blue-black

Orange to Pink

Blue to lilac / purple

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Illustration of a protein structure with various coloured shapes representing amino acids.

To test for proteins we can use solution.

biuret

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Biuret reagent can be used to test for the presence of proteins. If protein is present, what colour change takes place?

Blue to lilac / purple

Orange to blue-black

Orange to Pink

Blue to brick red

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Which reagent is used to test for the presence of lipids?

Biuret reagent

Iodine reagent

Benedict's reagent

Sudan III stain

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Sudan III test for lipids 


1 / 3 / 10 / red / pink / black


  1. Place 5cm3 of your food sample in a test tube.
  2. Add drops of Sudan III stain solution.  
  3. Gently shake.
  4. If a layer separates out on top, then lipid was present.
3
red

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2