9700/21/M/J/25 · Biology May/June 2025 Paper 21
6 questions, 60 marks. Each one links to its official mark scheme.
- Question 1 · 7 marks · Monomers, polymers and glucose, Sugars and glycosidic bonds
- Question 2 · 7 marks · Organelles, Prokaryotic cells
- Question 3 · 9 marks · Measuring enzyme activity, Vmax and Km
- Question 4 · 19 marks · Transcription and translation, Chromosomes and telomeres, Stem cells and tumours, Immune responses
- Question 5 · 6 marks · Transpiration, Translocation
- Question 6 · 12 marks · Haemoglobin, Oxygen dissociation curve
Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.