9700/21/O/N/20 · Biology October/November 2020 Paper 21
6 questions, 60 marks. Each one links to its official mark scheme.
- Question 1 · 8 marks · Chromosomes and telomeres, Stages of mitosis, The cell cycle
- Question 2 · 11 marks · Triglycerides, How enzymes work, Factors affecting rate
- Question 3 · 9 marks · Double circulation, Heart structure, Antibiotics
- Question 4 · 10 marks · Organelles, Viruses, Translocation
- Question 5 · 13 marks · Functions of the tissues, Structure of the gas exchange system, Surface area to volume ratio, Gas exchange in the alveoli, Collagen
- Question 6 · 9 marks · Stem cells and tumours, Gene mutations, Immune responses, Vaccination
Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.