AP Biology Unit 3: Cellular Energetics

Unit 3: Cellular Energetics: Enzymes, Respiration, and Photosynthesis Unit 3 is the energy backbone of AP Biology. Everything a cell does — growing, dividing, signaling, moving — requires energy, and this unit explains how that energy is captured, converted, and spent. The College Board weights this unit at 6–8% of the multiple-choice section, but its concepts appear throughout free-response questions in Units 4, 5, 6, and 8. Mastering enzymes, respiration, and photosynthesis gives you the vocabulary and models to reason about nearly every biological process. 3.1 Enzyme Structure and Function …