IGCSE Co-ordinated Sciences (9–1) 0973 · Biology · 19

0654.B4.1.01 — List the chemical elements that make up: carbohydrates, fats and proteins: past paper questions

5 real questionsasked in 4 of the last 10 exam series2020–2026usually: List

Real questions on 0654.b4.1.01 — list the chemical elements that make up: carbohydrates, fats and proteins

The newest 5 of 5 written questions. Open one to see it on the real paper.

0973/31 · May/June 2026 · Q2c[1]
Fish is a good source of protein in the diet. List all the chemical elements that make up proteins.
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0973/31 · October/November 2024 · Q1c(i)[1]
List the chemical elements in all carbohydrates.
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0973/41 · October/November 2023 · Q7c(i)[2]
List the chemical elements present in all proteins.
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0973/32 · May/June 2022 · Q4d[3]
Carbohydrate, protein and fat are made from chemical elements. Place ticks (3) in the boxes in Table 4.1 to show all the correct elements each substance is made from. Table 4.1 element substance carbon hydrogen oxygen nitrogen carbohydrate protein fat
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0973/32 · May/June 2020 · Q4b(i)[1]
Circle the four elements that are in a protein. carbon calcium nitrogen hydrogen water oxygen potassium
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What examiners said

Most candidates identified carbon, hydrogen and oxygen as the chemical elements present in all proteins but often missed out nitrogen. Amino acid was a common incorrect response.
— Examiner report, October/November 2023, 0973/41 Q7(c)(i) (Cambridge)

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In the syllabus

19 0654.B4.1.01 — List the chemical elements that make up: carbohydrates, fats and proteins

List the chemical elements that make up: carbohydrates, fats and proteins
State that large molecules are made from smaller molecules, limited to: (a). starch, glycogen and cellulose from glucose (b). proteins from amino acids (c). fats and oils from fatty acids and glycerol
Describe the use of: (a). iodine solution test for starch (b). Benedict’s solution test for reducing sugars (c). biuret test for proteins (d). ethanol emulsion test for fats and oils

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