9700/21/O/N/23 · Biology October/November 2023 Paper 21
6 questions, 60 marks. Each one links to its official mark scheme.
- Question 1 · 8 marks · Diffusion, osmosis and active transport, Carbon dioxide transport
- Question 2 · 11 marks · Organelles, Amino acids and protein structure, Cell signalling, Genes and the genetic code, Transcription and translation
- Question 3 · 12 marks · Xylem and phloem cells, Starch, glycogen and cellulose, Transpiration, Water
- Question 4 · 13 marks · Pathogens, Prevention and control, Immune responses, Cardiac cycle
- Question 5 · 8 marks · Gas exchange tissues in micrographs, Functions of the tissues, Fluid mosaic model, Phagocytes and antigens
- Question 6 · 8 marks · The cell cycle, DNA replication, Vmax and Km, Inhibitors
Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.