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AP Biology practice questions: 1,024
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Choose an answer to see the result and the explanation.
A student describes G1 as a resting stage because no chromosomes are visible under a light microscope. Which observation would best counter this description?
Little is visible in G1, but the cell is metabolically busy, duplicating organelles and cytosolic components. Absence of visible chromosomes does not mean absence of activity.
Why each option is right or wrong
- Incorrect. DNA is doubled later, during S phase, so a G1 cell has not yet replicated its genome.
- Incorrect. Chromosomes are not condensed during G1, so this mistakes a difference in DNA packing for a limit of the microscope.
- Incorrect. The nuclear envelope breaks down when mitosis begins, not during G1, so this does not describe what G1 cells are doing.
- Correct. Organelle duplication and synthesis of cell components are measurable activity, which directly contradicts the idea of rest.
Sources
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SYLLABUS
Areas covered
Questions follow the published syllabus of AP Biology.
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- Unit 1: Chemistry of Life97 questions
- Unit 2: Cells118 questions
- Unit 3: Cellular Energetics143 questions
- Unit 4: Cell Communication and Cell Cycle124 questions
- Unit 5: Heredity100 questions
- Unit 6: Gene Expression and Regulation143 questions
- Unit 7: Natural Selection169 questions
- Unit 8: Ecology130 questions
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GUIDE
About the AP Biology exam and how to study with examplat
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About AP Biology
AP Biology is a College Board Advanced Placement course and exam equivalent to a two-semester introductory college biology course. The course is organised into eight units: chemistry of life, cells, cellular energetics, cell communication and cell cycle, heredity, gene expression and regulation, natural selection, and ecology.
The exam is held once a year in May and is scored from 1 to 5. It has a multiple-choice section of 60 questions and a free-response section of 6 questions, each worth half of the score. Many universities grant credit or placement for qualifying scores, but each university sets its own policy. Check the College Board website for the current exam format, dates, calculator rules and score reporting.
How to study the question types
Many questions describe an experiment or give a data table and ask what the results support. Practise naming the independent variable, the dependent variable and the control first, then connect the data to the biological process, for example why a change in pH slows an enzyme or why a mutation changes a protein's function.
For calculations such as chi-square, Hardy-Weinberg, water potential and population growth, write the relationship down, keep track of what each symbol stands for, and check whether the size of your answer makes sense. Learn to explain a wrong option as well: knowing which misconception it represents is often what separates close choices.
How to use examplat for AP Biology
examplat holds 1,000 original multiple-choice questions organised by the eight course units, many built on data tables and experiment descriptions, with the reasoning behind every option and three step-by-step hints. Each question links to the sources behind it. Choose a unit, practise in short sessions, and come back to the questions you missed.
It has no study notes or interactive figures for this exam. It does not include free-response questions or laboratory work, so use your textbook, class notes and the free-response materials published by the College Board alongside it.
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