BI-190
Food tests
Biology · Secondary 3 · Medium · Food tests
A student adds iodine solution to two samples. Sample P turns blue-black while sample Q remains yellow-brown. Both samples give a brick-red precipitate with Benedict’s solution. What can be concluded?
- P contains starch and reducing sugar; Q contains only reducing sugar.
- P contains only starch; Q contains only reducing sugar.
- P contains only reducing sugar; Q contains starch and reducing sugar.
- Both P and Q contain only starch.
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