IB Diploma Biology HL, topic D2
Cells (Continuity and change)
How cells divide to make new cells, how they control which genes they use, and how water moves into and out of them. D2.1 covers cytokinesis, mitosis, meiosis and, at HL, the cell cycle and cancer. D2.2 (HL only) covers gene expression and epigenetics, and D2.3 covers osmosis and, at HL, water potential.
Revision notes
Worksheet
FlashcardsSubtopics
Work through them in order. Each one has notes, exam questions and flashcards, and a PDF of each.
- 1Cell and nuclear division Spec D2.1IB Biology D2.1: cytokinesis, mitosis and meiosis, non-disjunction and Down syndrome, sources of variation, and (HL) the cell cycle, cyclins and cancer.NotesQuestions 8Flashcards 23
- 2Gene expression HL onlySpec D2.2IB Biology HL D2.2: regulation of transcription and mRNA breakdown, genome vs transcriptome vs proteome, methylation, epigenetic inheritance and twins.NotesQuestions 6Flashcards 12
- 3Water potential Spec D2.3IB Biology D2.3: solvation, osmosis and tonicity, effects on cells with and without walls, isotonic solutions in medicine and (HL) water potential.NotesQuestions 7Flashcards 14
Whole topic
When you have done the subtopics: test yourself on everything, or print the lot.