O-LevelBiologyHuman Nutrition5090/11 · May/June 2013 · Q81 Mark
Which table states the tests for different food groups?
Atest: starch, reagent: iodine, positive result: blue-black; test: reducing sugars, reagent: Benedict's, positive result: orange; test: protein, reagent: biuret, positive result: purple; test: fats, reagent: ethanol, positive result: milky white
Btest: starch, reagent: biuret, positive result: blue-black; test: reducing sugars, reagent: Benedict's, positive result: orange; test: protein, reagent: iodine, positive result: purple; test: fats, reagent: ethanol, positive result: milky white
Ctest: starch, reagent: iodine, positive result: blue-black; test: reducing sugars, reagent: Benedict's, positive result: purple; test: protein, reagent: biuret, positive result: milky white; test: fats, reagent: ethanol, positive result: orange
Dtest: starch, reagent: biuret, positive result: blue-black; test: reducing sugars, reagent: Benedict's, positive result: purple; test: protein, reagent: iodine, positive result: milky white; test: fats, reagent: ethanol, positive result: orange
✓ Correct answer
A: test: starch, reagent: iodine, positive result: blue-black; test: reducing sugars, reagent: Benedict's, positive result: orange; test: protein, reagent: biuret, positive result: purple; test: fats, reagent: ethanol, positive result: milky white
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