A-LevelBiologyBiological moleculesMay/June 2023Paper 1 Q81 Mark
A student was provided with a solution of carbohydrate. They removed two samples from the solution and performed tests on each sample, as shown. [Figure 8.1] Which statement explains the results?
ACondensation reactions occur in sample two to release reducing sugar.
BGlycosidic bonds in a polysaccharide have been broken to release reducing sugar.
CSample one shows that sucrose is present in the carbohydrate solution.
DThe change in colour to a yellow solution shows that glucose is present.
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of biological molecules within the Biologysyllabus. The examiner's mark scheme requires...
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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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