Full-length practice exam modeled on the official College Board AP Biology exam. 60 stimulus-based MCQs and 6 free-response questions (2 long + 4 short) covering all 8 units. Each FRQ part has a 1-point rubric checklist you grade after submitting.
Section I — Multiple Choice
60 questions · 90 minutes
60 stimulus-based multiple-choice questions across all 8 units (Chemistry of Life; Cell Structure & Function; Cellular Energetics; Cell Communication & Cell Cycle; Heredity; Gene Expression & Regulation; Natural Selection; Ecology).
Section II — Free Response
6 items · 90 minutes
6 free-response questions: 2 long FRQs (~25 min each) and 4 short FRQs (~10 min each). Self-graded rubric checklist after each part.
Total time: 3h 0m. Each section has its own timer; sections are completed back-to-back. Free-response sections use a self-grading rubric checklist after you write your response.
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AP Biology is a college-level introductory biology course built around four Big Ideas: Evolution, Energetics, Information Storage and Transmission, and Systems Interactions. The eight units progress from the chemistry of life and cell structure through cellular energetics, cell communication and the cell cycle, heredity, gene expression and regulation, natural selection, and ecology. The course is heavily lab-based, and the College Board expects familiarity with the science practices, especially analyzing data, designing experiments, using mathematics like chi-square and Hardy-Weinberg, and constructing evidence-based arguments. Students often underestimate how much the exam rewards reasoning over memorization: questions routinely present unfamiliar data sets, graphs, or experimental setups and ask you to interpret them using core concepts. Natural Selection, Gene Expression and Regulation, and Cellular Energetics are the most heavily weighted units, so mastering photosynthesis, respiration, transcription/translation, operons, and evolutionary mechanisms pays off disproportionately. Effective preparation pairs conceptual review with deliberate FRQ practice, because the free-response section demands precise, structured answers that explicitly connect cause and effect. Practicing with released questions and grading yourself against official rubrics is the single most useful study habit, since points are awarded for specific claims and reasoning steps rather than general discussion. Quantitative skills matter too: be comfortable manipulating the formulas on the provided equations and formulas sheet, calculating allele frequencies, and interpreting statistical significance. Strong students treat AP Biology as a course in scientific thinking applied to living systems, building the habit of explaining mechanisms, predicting outcomes when a variable changes, and justifying conclusions with data rather than simply recalling vocabulary.
Two sections over 3 hours, each worth 50%: Section I is 60 multiple-choice questions in 90 minutes; Section II is 6 free-response questions in 90 minutes (2 long, worth up to 8-10 points each, and 4 short, worth 4 points each).
Section I (50%) and Section II (50%) combine into a composite that is converted to the reported AP score of 1 to 5.