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

Benedict's test

Bartholomew'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?

Glycogen

Proteins 

Lipids

Starch

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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 lilac / purple

Blue to brick red

Orange to blue-black

Orange to Pink

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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?

Orange to blue-black

Blue to lilac / purple

Blue to brick red

Orange to Pink

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

Benedict's test

Iodine test

Emulsion test

Biuret test

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Emulsion test for lipids 


cloudy / water / emulsion / acid / pink / ethanol


  1. Place your food sample in a test tube.
  2. Add 2cm3 of .
  3. Shake.
  4. Add 2cm3 of distilled .
  5. If a emulsion forms then lipid was present.
ethanol
water
cloudy

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