BI-1284
Food tests
Biology · Secondary 4 · Medium · Food tests
A student wants to test a solution for the presence of protein. Which reagent should be added and what is a positive result?
- Biuret reagent; solution turns violet.
- Iodine solution; solution turns blue‑black.
- Benedict’s solution; brick‑red precipitate forms.
- Ethanol then water; white emulsion forms.
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