6 topics · 72 free flashcards
AP Biology flashcards
Free revision cards for US high school students taking Advanced Placement courses for college credit, sorted by topic, with a quick quiz on every page.
About AP Biology
AP Biology spans an enormous range of concepts, from the molecular chemistry of macromolecules and enzyme kinetics all the way through cell signaling, genetics, evolution, and ecosystem ecology. What makes it genuinely demanding is that students must not only memorize facts but also interpret experimental data, design investigations, and apply concepts to unfamiliar scenarios. The sheer breadth of content, combined with the expectation of deep conceptual understanding rather than surface recall, catches many students off guard.
Because AP Biology requires connecting ideas across very different topics, active recall through flashcards forces you to retrieve information rather than passively re-read it, which builds the durable memory needed on exam day. Spaced repetition ensures that difficult concepts like the electron transport chain or meiotic nondisjunction are revisited just as you are about to forget them, making long-term retention far more efficient than cramming and freeing mental energy for the higher-order thinking the exam demands.
Flashcards by topic
12 cards · 3-question quiz
Chemistry of life
- · Why is water considered a polar molecule?
- · How does hydrogen bonding explain water's high specific heat?
- · What is the difference between dehydration synthesis and hydrolysis?
12 cards · 3-question quiz
Cell structure and function
- · What is the key structural difference between prokaryotic and eukaryotic cells?
- · What is the function of the mitochondrion?
- · What does the fluid mosaic model describe?
12 cards · 3-question quiz
Cellular energetics
- · What is the primary role of ATP in the cell?
- · How do enzymes affect activation energy in a reaction?
- · Where do the light-dependent reactions of photosynthesis occur?
12 cards · 3-question quiz
Cell communication and the cell cycle
- · What are the three stages of cell signaling?
- · What is a ligand?
- · How do G-protein-coupled receptors (GPCRs) work?
12 cards · 3-question quiz
Heredity and gene expression
- · What is the central dogma of molecular biology?
- · What is the difference between a gene's genotype and its expressed phenotype?
- · What happens during transcription?
12 cards · 3-question quiz
Natural selection and ecology
- · What are the four conditions required for natural selection to occur?
- · How is biological fitness defined in the context of natural selection?
- · What is the difference between directional, stabilizing, and disruptive selection?
What you need to master
- Students must understand the structure and function of biological macromolecules and explain how molecular shape determines biological activity.
- Students need to trace the flow of energy through cells, including the detailed steps of cellular respiration and photosynthesis and how they are regulated.
- Students must be able to interpret and construct graphs, diagrams, and experimental data, identifying variables, controls, and conclusions.
- Students should connect genetics and gene expression, from DNA replication and transcription through translation, mutation, and epigenetic regulation.
- Students need to apply the principles of natural selection, population genetics, and ecological relationships to novel scenarios and quantitative problems.
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AP Biology revision questions
How much memorization does AP Biology actually require?
There is a real foundation of terminology and processes you must know cold, such as the stages of mitosis, the Calvin cycle, and Mendelian ratios. However, the exam heavily rewards students who can apply and analyze rather than just recite. Aim to understand the why behind each process so you can handle questions set in contexts you have never seen before, rather than trying to memorize every isolated fact.
What is the best way to study for the AP Biology free-response questions?
Practice writing complete, precise answers using biological vocabulary, and always link your claim to a mechanism. Use past free-response questions released by the College Board to get a feel for how answers are evaluated. Focus on explaining causation rather than just describing what happens, and practice designing experiments including hypotheses, controls, and potential sources of error, since investigative thinking appears regularly.
How do I keep all the biochemistry pathways straight when studying?
Draw each pathway from memory rather than copying it from notes. Focus on the inputs, outputs, location, and purpose of each stage rather than every intermediate molecule. Connecting pathways to each other, for example seeing how glycolysis feeds into the Krebs cycle and how both connect to the electron transport chain, helps you build a coherent mental map instead of a list of disconnected steps.
Should I prioritize certain topics over others when time is short?
Cellular energetics, heredity and gene expression, and natural selection tend to appear heavily across both multiple-choice and free-response sections, so make sure those are solid. Cell communication and the cell cycle also reward careful study because questions often ask you to predict outcomes of disruptions. That said, ecology and chemistry of life questions do appear, so do not abandon any area entirely if you can help it.
Other courses
Written for general AP revision. Exam boards and schools differ, so check your own specification for exactly what you need to know. Lerno is not affiliated with any exam board.