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D2.2 Gene expression HL
Theme D - Continuity and change Level 2 - Cells This topic explores the way that information in genes has effects on the phenotype. Many genes in a cell are not transcribed and epigenetics is an important...
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C2.2 Neural signalling
Theme C - Interaction and interdependence Level 2 - Cells This topic explores the structure and function of neurons. This includes the generation of resting and action potentials, as well as synaptic...
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C2.1 Chemical signalling HL
Theme C - Interaction and interdependence Level 2 - Cells This topic explores the complex concept of chemical signalling in cells. Chemical signalling allows the cells to respond to signals in a highly...
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B2.3 Specialised Cells
Theme - Theme B - Form and function & Level 2 - Cells This topic explores the importance of stem cells and cell differentiation to form specialized cells in multicellular organisms, including mammals....
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B2.2 Organelles
Theme B - Form and function & Level 2 - Cells This topic explores the structure and function of organelles. Why do some organelles have a double membrane? What are the benefits of compartmentalization?...
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B2.1 Membranes & transport
Theme B - Form and function & Level 1 - Molecules This topic looks at the structure of membranes and the transport of small molecules and ions across membranes. Also covered is the role of lipids in...
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A2.3 Viruses
Theme A - Unity and diversity & Level 2 - Cells This topic explores the structure and the life cycle of viruses. The lytic cycle is well known but the lysogenic cycle is also important. With the existence...
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A2.2 Cell structure
Theme A - Unity and diversity & Level 2 - Cells This topic explores the ultrastructure of both eukaryote and prokaryote cells. Students use microscopes to produce images of cells and to consider the...
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A2.1 Origin of cells
Theme A - Unity and diversity & Level 1 - Cells This topic explores the evidence for the spontaneous origin of the first life on Earth and the research which has tried to identify the last unique common...
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D2.3 Water potential
Theme D - Continuity and change & Level 2 Cells This topic explores osmosis, water potential and the movement of water into and out of cells in different situations. The importance of osmosis to medical...