D: Change
Master IB Biology D: Change with notes created by examiners and strictly aligned with the syllabus.
D1.1
DNA replication
Semi-conservative replication, Complementary base pairing, PCR, Gel electrophoresis, Leading and lagging strands, Proofreading
D1.2
Protein synthesis
Transcription, Translation, Genetic code, Directionality, RNA processing, Proteasomes
D1.3
Mutations and gene editing
Gene mutations, SNPs, frameshifts, mutagens, germ-line inheritance, CRISPR-Cas9, conserved sequences
D2.1
Cell and nuclear division
Cell division, Cytokinesis, Mitosis, Meiosis, Cell cycle control, Tumours
D2.2
Gene expression
Transcription control, mRNA stability, epigenesis, methylation, epigenetic inheritance, environmental regulation
D2.3
Water potential
Solvation, Osmosis, Tonicity, Turgor, Plasmolysis, Water potential
D3.1
Reproduction
Asexual and sexual reproduction, gametes, menstrual cycle, fertilization, flowering plants, pregnancy
D3.2
Inheritance
Gametes, Alleles, Inheritance patterns, Pedigrees, Linkage, Chi-squared testing
D3.3
Homeostasis
Negative feedback, Hormonal control, Thermoregulation, Diabetes, Kidney osmoregulation, Blood distribution
D4.1
Natural selection
Variation, selection pressures, allele frequencies, sexual selection, Hardy–Weinberg, artificial selection
D4.2
Stability and change
Ecosystem stability, Tipping points, Sustainability, Pollution, Rewilding, Succession
D4.3
Climate change
Greenhouse gases, Feedback cycles, Tipping points, Habitat change, Range shifts, Phenology, Carbon sequestration
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