A - Unity and Diversity
B - Form and Function
C - Interaction and Interdependence
D - Continuity and Change
D1.1 DNA replication
D1.2 Protein synthesis
D1.3 Mutations and gene editing
D2.1 Cell and nuclear division
D2.2 Gene expression (HL)
D2.3 Water potential
D3.1 Reproduction
D3.2 Inheritance
D3.3 Homeostasis
D4.1 Natural selection
D4.2 Sustainability and change
D4.3 Climate change
View a summary cheatsheet for D2.2 Gene expression (HL)
D2.2.1 Gene expression
D2.2.2 Regulation of transcription by proteins
D2.2.3 Control of the degradation of mRNA
D2.2.4 Epigenesis
D2.2.5 Differences between the genome, transcriptome and proteome of individual cells
D2.2.6 Methylation of the promoter and histones in nucleosomes as examples of epigenetic tags
D2.2.7 Epigenetic inheritance through heritable changes to gene expression
D2.2.8 Examples of environmental effects on gene expression in cells and organisms
D2.2.9 Consequences of removal of most but not all epigenetic tags from the ovum and sperm
D2.2.10 Monozygotic twin studies
D2.2.11 External factors impacting the pattern of gene expression
