CED Units

Eight units, ranked by exam weight.

Unit 7 (Natural Selection) is the highest-weight on most exams; Unit 3 and Unit 6 are close behind. Every page below has a summary, example questions, and a flashcard strip.

1 Chemistry of Life Water properties, macromolecules, monomers/polymers, directionality.

Energetics · Systems 8–11% 2 Cell Structure and Function Organelles, membrane transport, tonicity, endosymbiotic theory.

Energetics · Systems 10–13% 3 Cellular Energetics Enzymes, photosynthesis, cellular respiration, fermentation, ΔG.

Energetics 12–16% 4 Cell Communication & Cell Cycle Signal transduction, feedback, cell cycle, checkpoints, cancer.

Information · Systems 10–15% 5 Heredity Meiosis, Mendelian genetics, linkage, pedigrees, chi-square.

Information 8–11% 6 Gene Expression & Regulation Replication, transcription, translation, mutations, operons, biotech.

Information 12–16% 7 Natural Selection Highest-weight unit. Evolution mechanisms, Hardy-Weinberg, speciation.

Evolution 13–20% 8 Ecology Population & community ecology, energy flow, biogeochem cycles.

Systems 10–15%