WAEC - Biology (2004 - No. 17)
A urine sample of a patient, tested with Benedict/Fehling solution, gave an orange colored precipitate,
indicating the presence of
indicating the presence of
glucose
sucrose
lactose
maltose
คำอธิบาย
Though the Benedict's and Fehling's tests are tests for sugars but the Fehling's test can only detect monosaccharides. So, though the sample gets result with the Benedict's test, the test only yields result with the Fehling's solution if it is a monosaccharide e.g glucose, fructose and galactose.