BI-953
Food tests (practical)
Biology · Secondary 3 · Easy · Food tests (practical)
A student wants to compare the protein content of two brands of tofu using the Biuret test. Which variable must be kept the SAME for both samples to make the comparison fair?
- Type of test tube used
- Volume of tofu solution used
- Brand of Biuret solution used
- Time taken to observe the colour
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