To combat the global challenge of plastic accumulation, biodegradable polyesters such as polylactic acid (PLA\text{PLA}PLA) are increasingly used as sustainable alternatives to traditional petrochemical plastics. The environmental breakdown of PLA\text{PLA}PLA occurs via the enzymatic or chemical hydrolysis of its polymer backbone.
Which of the following represents the formula of the functional group linkage cleaved during the biodegradation of PLA\text{PLA}PLA?
−CONH−-\text{CONH}-−CONH−
−COO−-\text{COO}-−COO−
−O−-\text{O}-−O−
−CH2−CH2−-\text{CH}_2-\text{CH}_2-−CH2−CH2−
83 exam-style questions on OCR GCSE Chemistry Organic chemistry. Each one has a worked solution and a mark scheme showing where the marks go.