Biochemical tests for molecules

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What test is for sugars?
Benedicts test
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Explain Benedicts test for reducing sugars
Add benedicts reagent to a sample and heat it in a water bath that has been brought to the boil. The colour changes from blue to brick red. The higher the concentration the further the colour change.
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Explain Benedicts test for non-reducing sugars
Adding dilute hydrochloric acid and using the same method as before. Neutralise it with sodium hydrogencarbonate. Same as first.
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What is the test for glucose?
Test strips change colour if present
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What is the test for starch?
Add iodine dissolved in potassium iodide solution to sample. Goes to blue/black is present
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What is the test for proteins?
Biurets test. Add sodium hydroxide solution, then add copper 2 sulfate solution. Purple if present
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What is the test for lipids?
Emulsion test. Shake with ethanol for a minute, milky if present
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Other cards in this set

Card 2

Front

Explain Benedicts test for reducing sugars

Back

Add benedicts reagent to a sample and heat it in a water bath that has been brought to the boil. The colour changes from blue to brick red. The higher the concentration the further the colour change.

Card 3

Front

Explain Benedicts test for non-reducing sugars

Back

Preview of the front of card 3

Card 4

Front

What is the test for glucose?

Back

Preview of the front of card 4

Card 5

Front

What is the test for starch?

Back

Preview of the front of card 5
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