0654.B4.1.03 — Describe the use of: (a). iodine solution test for starch (b). Benedict’s solution test for reducing sugars (c). biuret test for proteins (d: past paper questions
Real questions on 0654.b4.1.03 — describe the use of: (a). iodine solution test for starch (b). benedict’s solution test for reducing sugars (c). biuret test for proteins (d
The newest 13 of 13 written questions. Open one to see it on the real paper.
- 0654/32 · October/November 2025 · Q1b(i)[3]
Reducing sugars are absorbed into the blood from the alimentary canal. Describe the test for reducing sugar and the colour change observed for a positive result. test colour change: starting colour
See it on the paper → - 0654/32 · February/March 2025 · Q2b(ii)[2]
Reducing sugars are small biological molecules. State the name of the reagent used to test for reducing sugars. Give the observation for a positive result. reagent observation for a positive result
See it on the paper → - 0654/22 · May/June 2022 · Q3[1]
Which reagent is used to test for the presence of protein in a food sample?
See it on the paper → - 0654/11 · May/June 2021 · Q3[1]
From these results, which nutrient is in the food?
See it on the paper → - 0654/11 · May/June 2021 · Q24[1]
Other than hydrogen and oxygen, which substance provides only one of the essential elements for plant growth?
See it on the paper → - 0654/11 · May/June 2021 · Q25[1]
What is the chemical name for lime?
See it on the paper → - 0654/11 · May/June 2021 · Q30[1]
Which statement applies to a system in equilibrium?
See it on the paper → - 0654/21 · May/June 2021 · Q3[1]
From these results, which nutrient is in the food?
See it on the paper → - 0654/11 · October/November 2020 · Q3[1]
Which row is true for a protein?
See it on the paper → - 0654/11 · October/November 2020 · Q20[1]
Which chemical test does not produce a precipitate?
See it on the paper → - 0654/11 · October/November 2020 · Q23[1]
Which row shows the results of the tests?
See it on the paper → - 0654/21 · October/November 2019 · Q3[1]
Which result with the biuret test shows that protein is present?
See it on the paper → - 0654/22 · October/November 2019 · Q3[1]
result with the biuret test shows that protein is present?
See it on the paper →
What examiners said
Benedict’s reagent was well known as the reagent used to test for reducing sugars.
— Examiner report, February/March 2025, 0654/32 Q2(b)(ii) (Cambridge)
Candidates chose the incorrect option B more often than the correct option, D. The three essential elements required for plant growth are nitrogen, potassium and phosphorus. Only option D contained just one of these elements.
— Examiner report, May/June 2021, 0654/11 Q24 (Cambridge)
Candidates chose the incorrect options A and D more often than the correct option, C. Candidates are expected to know that lime, calcium oxide, is made by the thermal decomposition of limestone, calcium carbonate. They should also understand that when basic oxides dissolve in water they form alkaline hydroxides, such as calcium hydroxide. They are expected to know that calcium sulfate is the produ...
— Examiner report, May/June 2021, 0654/11 Q25 (Cambridge)
Past papers, syllabus and examiner reports © UCLES (Cambridge University Press & Assessment). Questions are matched to topics from the official syllabus. AssessPro is independent and not endorsed by Cambridge.