9700/23/O/N/20 · Biology October/November 2020 Paper 23
6 questions, 60 marks. Each one links to its official mark scheme.
- Question 1 · 9 marks · Structure of the gas exchange system
- Question 2 · 8 marks · Xylem and phloem cells, Translocation
- Question 3 · 10 marks · The cell cycle, Stages of mitosis, Stem cells and tumours
- Question 4 · 6 marks · Antibiotics, Vaccination
- Question 5 · 18 marks · Amino acids and protein structure, Collagen, How enzymes work, Factors affecting rate
- Question 6 · 9 marks · Magnification calculations, Diffusion, osmosis and active transport, Organelles
Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.