A-LevelBiologyBiological molecules9700/12 · May/June 2020 · 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

C: boil with hydrochloric acid, neutralise with alkali and repeat the Benedict's test

Oracle Prep sorts past-paper questions by topic, so you can drill Biological molecules and see which topics are most likely to come up next.

Topic: Biological molecules, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, May/June 2020 Paper 1 Variant 2, question 7.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content