May/June 2026 Paper 12

2026 · 40 questions · 40 parts · 40 marks

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10CarbohydratesHard1 mark
X and Y are two molecules of amylose.
  • Amylose molecule X is made from a chain of 700 glucose monomers.
  • Amylose molecule Y is made from a chain of 300 glucose monomers.
How many water molecules are needed to hydrolyse molecule X completely into glucose monomers and molecule Y completely into maltose?