GCSE Biology - Food Tests Activity Worksheet

This resource is a GCSE-level activity worksheet with an accompanying answer sheet focused on food tests.

It guides students through the identification and procedural steps for conducting various biochemical tests to detect the presence of starch, lipids, reducing sugars and proteins in food samples.

The worksheet is divided into four main sections:

• Iodine test for starch, where students identify the test steps and understand the colour change indicating a positive or negative result.
• Emulsion test for lipids, outlining the process for creating a white cloudy emulsion and its significance.
• Benedict’s test for reducing sugars, detailing the heating process and colour changes from blue to green, yellow, orange or red based on sugar concentration.
• Biuret test for proteins, which involves adding sodium hydroxide and copper sulfate to a sample and observing colour changes to purple for a positive result.

This educational tool provides clear examples and checklists for each test, making it an ideal resource for both classroom learning and revision.

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