SL path
Unit 1 Body Systems
| Subtopic | Practical | Type | Time | Statements |
|---|---|---|---|---|
| B3.1 (Animal) | Measuring lung volumes | Lab | 30 min | B3.1.6 |
| B3.2 (Animal) | Pulse rate and exercise | Lab | 30 min | B3.2.4 |
| C2.2 | Reaction time with a falling ruler | Lab | 25 min | C2.2.1, C2.2.5 |
| C3.1 | Heart and breathing rate during exercise | Lab | 35 min | C3.1.14, C3.1.15 |
| D3.3 | Evaporative cooling and body temperature | Lab | 40 min | D3.3.5, D3.3.6 |
| C3.2 | Modelling an epidemic and herd immunity | Model | 40 min | C3.2.17 |
| D3.1 (Human) | Plotting hormones across the menstrual cycle | Data | 35 min | D3.1.5 |
Unit 2 Plant Systems
| Subtopic | Practical | Type | Time | Statements |
|---|---|---|---|---|
| B3.1 (Plant) | Stomatal density from leaf impressions | Lab | 40 min | B3.1.10 |
| B3.2 (Plant) | Tracing water through xylem | Lab | 30 min, plus a few hours | B3.2.7, B3.2.8, B3.2.9 |
| D3.1 (Plant) | Dissecting an insect-pollinated flower | Lab | 35 min | D3.1.8, D3.1.9 |
Unit 3 Genetics
| Subtopic | Practical | Type | Time | Statements |
|---|---|---|---|---|
| D1.1 | Modelling semi-conservative replication | Model | 30 min | D1.1.1, D1.1.2, D1.1.3 |
| D1.2 | From gene to polypeptide | Model | 30 min | D1.2.6, D1.2.8, D1.2.9 |
| D1.3 | Modelling the effects of mutations | Model | 30 min | D1.3.2, D1.3.3 |
| D2.1 | Finding the mitotic index of a root or shoot tip | Lab | 45 min | D2.1.7, D2.1.8 |
| D3.2 | Light, dark and genetic barley seedlings | Lab | 20 min to set up, then 3 to 5 days | D3.2.4, D3.2.5, D3.2.6 |
Unit 4 Biomolecules
| Subtopic | Practical | Type | Time | Statements |
|---|---|---|---|---|
| A1.1 | Cohesion and adhesion of water | Lab | 30 min | A1.1.3, A1.1.4 |
| A1.2 | Extracting DNA from strawberries | Lab | 35 min | A1.2.1 |
| B1.1 | Testing foods for carbohydrates and lipids | Lab | 50 min | B1.1.4, B1.1.5, B1.1.8 |
| B1.2 | Denaturing egg white protein | Lab | 30 min | B1.2.5 |
| C1.1 | Temperature and catalase activity | Lab | 50 min | C1.1.8, C1.1.9 |
| C1.2 | Yeast respiration and temperature | Lab | 40 min | C1.2.6 |
| C1.3 | Light intensity and floating leaf discs | Lab | 50 min | C1.3.7 |
Unit 5 Cells
| Subtopic | Practical | Type | Time | Statements |
|---|---|---|---|---|
| A2.2 | Drawing and measuring onion cells | Lab | 45 min | A2.2.2 |
| B2.1 | Selective movement through dialysis tubing | Lab | 40 min | B2.1.3, B2.1.8 |
| B2.2 | Observing chloroplasts in living cells | Lab | 30 min | B2.2.1, B2.2.3 |
| B2.3 | Surface area, volume and diffusion | Lab | 40 min | B2.3.6 |
| D2.3 | Osmosis in potato tissue | Lab | 50 min | D2.3.3, D2.3.4 |
Unit 6 Biodiversity
| Subtopic | Practical | Type | Time | Statements |
|---|---|---|---|---|
| A3.1 | Making a karyogram | Data | 40 min | A3.1.7 |
| A4.1 | Comparing protein sequences between species | Data | 40 min | A4.1.2 |
| A4.2 | Comparing species in two habitats | Field | 50 min | A4.2.1 |
| D4.1 | Modelling natural selection with beak tools | Model | 35 min | D4.1.3, D4.1.5 |
| B4.2 | Sun leaves and shade leaves | Field | 40 min | B4.2.11 |
Unit 7 Ecosystems
| Subtopic | Practical | Type | Time | Statements |
|---|---|---|---|---|
| B4.1 | Abiotic factors along a transect | Field | 50 min | B4.1.3 |
| C4.1 | Estimating population size with quadrats | Field | 45 min | C4.1.2, C4.1.3 |
| C4.2 | Analysing the Keeling curve | Data | 35 min | C4.2.20 |
| D4.2 | Fertiliser and aquatic plant growth | Lab | 20 min, then 2 weeks | D4.2.7 |
| D4.3 | Modelling heat trapping by carbon dioxide | Model | 40 min | D4.3.1 |
AHL path
Unit H1 Body Systems
| Subtopic | Practical | Type | Time | Statements |
|---|---|---|---|---|
| B3.3 | Range of motion at a joint | Lab | 30 min | B3.3.6, B3.3.7 |
| C2.1 | Modelling signal amplification | Model | 25 min | C2.1.7, C2.1.10 |
| B3.1 | Plotting oxygen dissociation curves and the Bohr shift | Data | 35 min | B3.1.12, B3.1.13 |
| B3.2 | Examining a mammalian heart | Lab | 50 min | B3.2.15 |
| C2.2 | Reading action potential traces | Data | 30 min | C2.2.8, C2.2.10 |
| D3.3 | Modelling filtration in the kidney | Model | 40 min | D3.3.8 |
| D3.1 | Interpreting hormone data in pregnancy | Data | 30 min | D3.1.19 |
Unit H2 Plant Systems
| Subtopic | Practical | Type | Time | Statements |
|---|---|---|---|---|
| C3.1 | Phototropism in seedlings | Lab | 20 min, then 5 days | C3.1.17, C3.1.18 |
| D2.3 | Finding the water potential of a tissue | Lab | 50 min | D2.3.9, D2.3.11 |
Unit H3 Genetics
| Subtopic | Practical | Type | Time | Statements |
|---|---|---|---|---|
| D2.2 | Light and gene expression in seedlings | Lab | 20 min, then 7 days | D2.2.8 |
| D1.1 | Modelling leading and lagging strands | Model | 30 min | D1.1.6, D1.1.7, D1.1.8 |
| D1.2 | Modelling alternative splicing | Model | 25 min | D1.2.15, D1.2.16 |
| D1.3 | Modelling gene editing with CRISPR-Cas9 | Model | 25 min | D1.3.9 |
| D2.1 | Calculating a mitotic index | Lab | 40 min | D2.1.13, D2.1.14 |
| D3.2 | Dihybrid crosses and chi-squared | Model | 45 min | D3.2.17, D3.2.21 |
Unit H4 Biomolecules
| Subtopic | Practical | Type | Time | Statements |
|---|---|---|---|---|
| A1.1 | Water and the search for other worlds | Data | 30 min | A1.1.8 |
| A1.2 | Testing Chargaff's rules | Data | 30 min | A1.2.15 |
| B1.2 | Folding a model protein | Model | 35 min | B1.2.7, B1.2.8, B1.2.9 |
| C1.1 | Modelling competitive inhibition | Model | 30 min | C1.1.15 |
| C1.2 | Hydrogen carriers and yeast | Lab | 40 min | C1.2.7 |
| C1.3 | The Hill reaction with chloroplasts | Lab | 50 min | C1.3.11, C1.3.14 |
Unit H5 Cells
| Subtopic | Practical | Type | Time | Statements |
|---|---|---|---|---|
| A2.1 | Modelling how membranes assemble | Model | 25 min | A2.1.5 |
| A2.3 | Modelling lytic and lysogenic cycles | Model | 30 min | A2.3.3, A2.3.4 |
| A2.2 | Differentiated tissues under the microscope | Lab | 40 min | A2.2.13, A2.2.14 |
| B2.1 | Temperature and membrane permeability | Lab | 50 min | B2.1.11, B2.1.12 |
| B2.2 | Organelles in electron micrographs | Data | 35 min | B2.2.4, B2.2.5 |
| B2.3 | Specialized cells under the microscope | Lab | 40 min | B2.3.8, B2.3.9 |
Unit H6 Biodiversity
| Subtopic | Practical | Type | Time | Statements |
|---|---|---|---|---|
| A3.2 | Building a cladogram from sequences | Data | 35 min | A3.2.6, A3.2.7 |
| A3.1 | Making a dichotomous key | Field | 45 min | A3.1.14 |
| A4.1 | Modelling allopatric speciation | Model | 35 min | A4.1.8 |
| D4.1 | Hardy-Weinberg with beads | Model | 35 min | D4.1.13, D4.1.14 |
Unit H7 Ecosystems
| Subtopic | Practical | Type | Time | Statements |
|---|---|---|---|---|
| D4.2 | Succession in a jar | Lab | 20 min, then 2 weeks | D4.2.11 |
| D4.3 | Trends in the timing of spring | Data | 35 min | D4.3.9, D4.3.10 |