Biology › Section D · Energy: metabolism, respiration, photosynthesis › Topic D.1
Energy and metabolism
A cell is a chemical factory that never closes. Before the factory tour - glycolysis, respiration, photosynthesis - you need the floor plan: pathways, the anabolic-catabolic ledger, and the energy bookkeeping (kinetic, potential, free, and the sign of delta G) that makes sense of every reaction to come.
In this topic
- Metabolism: the cell's whole chemistry
- Metabolic pathways
- Anabolism and catabolism: build and burn
- Glucose: the two-way equation
- Energy's journey through the biosphere
- Kinetic, potential, and chemical energy
- Free energy and delta G
- Exergonic and endergonic reactions
- Worked example: the wrecking ball
- Worked example: sorting the everyday cases
- Common mistakes to avoid
- Key takeaways
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