Biology SL
Follow energy and matter through enzyme-controlled pathways, ATP production in respiration, and carbon fixation in photosynthesis—from active-site collisions to chemiosmotic membranes.
2 simulation entries
Compare productive collisions with activation-energy profiles, then test how temperature, pH and substrate concentration change pathway rate.
Appears in: 2.1 Enzymes and Metabolic Pathways
Molecular control bench
Relative pathway rate
66%
Scan wavelength across chlorophyll a, chlorophyll b and carotenoids; compare combined absorption with predicted photosynthetic action.
Appears in: 2.6 Photosynthesis, Light and Pigments, 2.7 Measuring Photosynthesis and Limiting Factors
Photon → electron → carbon
Combined pigment absorption
100%
Action follows combined absorption because only absorbed photons can excite photosystem pigments.