- Protein synthesis stages: transcription, translation, ribosomes, mRNA, tRNA, amino acids. - Mutagenesis: amino acid sequence alteration, β-globin polypeptide, haemoglobin structure, function implications. - Enzyme activity: pepsin, hydrolysis, competitive inhibitors, reaction rates, temperature effects. - Red blood cells: identification criteria, capillary function, tissue fluid composition differences. - Altitude adaptation: haemoglobin concentration, oxygen saturation, physiological changes, blood oxygen levels. - Stomatal regulation: guard cells, cellulose microfibrils, ion movement, transpiration effects, channel proteins.