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Biological molecules

4.1

What the syllabus asks of you

  • List the chemical elements that make up: (a) carbohydrates (b) lipids (fats and oils) (c) proteins (d) DNA
  • State that large molecules are made from smaller molecules, limited to: starch, cellulose and glycogen from glucose; proteins from amino acids; lipids from fatty acids and glycerol; DNA from nucleotides
  • Describe and be able to do chemical tests for: (a) starch (iodine solution) (b) glucose and maltose (Benedict’s solution) (c) protein (biuret test) (d) lipids (ethanol emulsion test)

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Chapter 4: Biological molecules

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2 questions

1May / June 2020 · Paper 12 · Q12Also set in May / June 2020 Paper 11
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ABenedict's solution: + ; iodine solution: +
BBenedict's solution: + ; iodine solution: –
CBenedict's solution: – ; iodine solution: +
DBenedict's solution: – ; iodine solution: –

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2May / June 2019 · Paper 11 · Q1
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AA
BB
CC
DD

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