AP Biology curriculum & tutors

Science

An AP Biology path centered on chemistry of life, cells, energetics, communication, heredity, gene expression, natural selection, ecology, and data-driven biological argument.

8 public curriculum units1 tutor availableAlways Free
AP Biology / introductory college biology

AP Biology curriculum

An AP Biology path centered on chemistry of life, cells, energetics, communication, heredity, gene expression, natural selection, ecology, and data-driven biological argument.

Pacing
8 units, 28-36 weeks self-paced
Units
8 unit sequence
Practice
640 checked answers
Support
Self-paced or tutor-guided
Outcomes
  • Explain biological systems across molecular, cellular, organismal, population, and ecosystem scales.
  • Use evidence, models, statistics, and experimental design to justify biological claims.
  • Prepare for AP-style data analysis and free-response reasoning without copying official exam items.

Video companion links

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Unit sequence

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  1. 01

    Chemistry of life

    • Use water chemistry, elements of life, macromolecules, protein structure, enzymes, and energy coupling.
    • Connect structure to function at the molecular level.

    Practice: Explain how one macromolecule's structure supports its biological function with evidence.

  2. 02

    Cells

    • Compare cell structures, membranes, transport, compartmentalization, and cell size limits.
    • Use models to predict cell behavior.

    Practice: Analyze a membrane-transport scenario with concentration gradients and evidence.

  3. 03

    Cellular energetics

    • Explain photosynthesis, cellular respiration, enzymes, ATP, and energy transfer.
    • Track matter and energy through cellular pathways.

    Practice: Build a matter-and-energy flow map for respiration or photosynthesis and explain the evidence.

  4. 04

    Cell communication and cell cycle

    • Model signal transduction, feedback, checkpoints, mitosis, and cell-cycle regulation.
    • Predict effects of pathway disruption.

    Practice: Trace a signaling pathway from ligand to cellular response and identify one possible failure point.

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