A-LevelBiologyBiological moleculesFeb/Mar 2024Paper 1 Q71 Mark
Which flow chart outlining the test for non-reducing sugars is correct? [Figure 7.1]
Aadd alkaline sodium hydrogencarbonate to sample → neutralise with dilute hydrochloric acid → add Benedict's solution and boil
Badd alkaline sodium hydrogencarbonate to sample → neutralise with dilute hydrochloric acid → add biuret solution and boil
Cboil sample with dilute hydrochloric acid → neutralise with sodium hydrogencarbonate → add Benedict's solution and boil
Dboil sample with dilute hydrochloric acid → neutralise with sodium hydrogencarbonate → add biuret solution and boil
✓ 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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