A-LevelBiologyBiological molecules9700/12 · Oct/Nov 2015 · Q71 Mark
The colour of a positive Benedict's test is due to the formation of copper oxide. The mass of copper oxide is proportional to the mass of reducing sugar present. Samples of fruit juice were tested for the presence of reducing sugars and non-reducing sugars using the Benedict's test. The results show the mass of copper oxide after boiling with Benedict's solution and after acid hydrolysis and boiling with Benedict's solution. Which sample contained the most non-reducing sugar?
A20 20
B30 45
C50 55
D65 75
✓ Correct answer
B: 30 45
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