Starch forms when glucose molecules join together, releasing one molecule of water for each link made. A student makes three statements about natural polymers.
Statement 1: starch and proteins are both polymers, but they are made from different types of monomer
Statement 2: DNA is a polymer made from nucleotide monomers
Statement 3: starch is made from glucose, so its repeating unit has the same formula as glucose, C6H12O6\mathrm{C_{6}H_{12}O_{6}}C6H12O6
Which statements are correct?
1 only
1 and 2 only
2 and 3 only
1, 2 and 3
37 exam-style questions on Edexcel GCSE Chemistry 10.3 Polymers, covering 10.3.1 Addition polymerisation of alkenes, 10.3.2 Uses and properties of polymers, 10.3.3 Condensation polymers and polyesters, 10.3.4 Problems with polymers and recycling, and 10.3.5 Natural polymers: DNA, starch and proteins. Each one has a worked solution and a mark scheme showing where the marks go.