A-LevelBiologyBiological moleculesMay/June 2020Paper 1 Q71 Mark
A student carried out the Benedict's test on a sample and got a negative result. What should the student do to confirm there are no sugars present in the sample?
Aboil the sample for 5 minutes then repeat the Benedict's test
Bboil with alkali, neutralise with hydrochloric acid and repeat the Benedict's test
Cboil with hydrochloric acid, neutralise with alkali and repeat the Benedict's test
Drepeat the Benedict's test but add more Benedict's reagent
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of biological molecules within the Biologysyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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