9700/21/M/J/20 · Biology May/June 2020 Paper 21
6 questions, 60 marks. Each one links to its official mark scheme.
- Question 1 · 6 marks · Sugars and glycosidic bonds, Triglycerides, Starch, glycogen and cellulose, Amino acids and protein structure, Fluid mosaic model, Water
- Question 2 · 11 marks · Stages of mitosis, Chromosomes and telomeres
- Question 3 · 9 marks · Vmax and Km, Amino acids and protein structure
- Question 4 · 16 marks · Carbon dioxide transport, Gas exchange in the alveoli, Functions of the tissues, Blood cells
- Question 5 · 14 marks · Pathogens, How diseases spread, Immune responses, Vaccination
- Question 6 · 4 marks · Nucleotides, ATP and RNA, Transcription and translation
Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.