A biologist is studying a newly catalogued plant. Three unlabelled naturally occurring polymer samples are analysed to identify which sample contains the polymer that stores the coded information directing the plant's development and functioning.
Chemical analysis identifies the monomers in each sample. Structural analysis records the chain arrangement in most molecules.
| Sample | Monomers identified | Chain arrangement in most molecules |
|---|---|---|
| A | Amino acids | One polymer chain |
| B | Glucose | One polymer chain |
| C | Four different types of nucleotide | Two polymer chains coiled around each other |
Which sample should the biologist select? Explain your answer.
94 exam-style questions on AQA GCSE Chemistry 7.3 Synthetic and naturally occurring polymers, covering 7.3.1 Addition polymerisation, 7.3.2 Condensation polymerisation, 7.3.3 Amino acids, and 7.3.4 DNA (deoxyribonucleic acid) and other naturally occurring polymers. Each one has a worked solution and a mark scheme showing where the marks go.