The free response section is half of your AP Biology score and the part most students underprepare for. There are six FRQs: two long questions worth 9 points each and four short questions worth 4 points each, for 34 raw points in 90 minutes. Every answer is handwritten in a paper booklet. This page breaks down the format, the six science practices the questions test, and the scoring patterns that decide points on the published rubrics.
FRQs
6
2 long + 4 short
Time
90 min
~25 min per long, ~10 per short
Raw points
34
2×9 + 4×4
Section weight
50%
Equal with MCQ
The six question types
FRQ Section II
Unlike some AP exams, AP Biology fixes the roles of the six questions. The two long questions both center on interpreting and evaluating experimental results, and each carries the section's data-analysis, graphing, and statistics work. The four short questions each target one focused skill. Across all six, six AP Biology science practices are assessed: Concept Explanation, Visual Representations, Questions & Methods, Representing & Describing Data, Statistical Tests & Data Analysis, and Argumentation.
01
Long: interpreting and evaluating experimental results
2 questions · 9 points each · Data, graphing, statistics
The two heaviest questions. Each hands you an experiment and its data and asks you to analyze results, construct a graph, apply statistics such as means, standard error, error bars, or chi-square, and then argue a conclusion the data actually support. This is where Representing & Describing Data, Statistical Tests & Data Analysis, and Argumentation are graded most directly.
Label both axes with units and choose a scale that fills the grid; a graph without units or a title rarely earns full graphing credit.
Plot points accurately, then connect or draw a best-fit line as the data warrant, and add error bars when SEM is given.
Justify with the data in front of you, citing specific values or trends, not a general biology fact.
02
Short: scientific investigation
Short · 4 points · Questions & Methods
Design or refine an experiment: state a hypothesis or prediction, identify the independent and dependent variables, and specify a control and what is held constant. Often you must describe how you would measure the outcome and what result would support or refute the hypothesis.
Name the independent variable, the dependent variable, and a control explicitly; implying them loses points.
Say what you hold constant and describe a measurable, quantifiable outcome.
State the predicted result for each condition so the design connects to the hypothesis.
03
Short: analyzing a model or visual representation
Short · 4 points · Visual Representations
Read a diagram, cycle, pedigree, phylogenetic tree, or other model and explain what it shows. You may be asked to predict how a change to one part propagates through the system, or to describe a process the model represents.
Read every label and axis before answering; points are lost to misreading the model, not to weak biology.
Reference specific structures or steps in the representation rather than describing the process in the abstract.
When asked to predict a change, trace the effect through the model step by step.
04
Short: analyzing data
Short · 4 points · Representing & Describing Data
A focused data question built on a smaller table or graph. Describe a trend, calculate or compare values, and draw a conclusion the data support. Correlation-versus-causation traps are common here.
Describe the trend with numbers ("increased from X to Y"), not just direction words.
Do not claim causation from a correlation unless the design controls for it; say what additional data you would need.
Answer only what the data show; an outside fact that the data do not support scores nothing.
05
Short: analyzing a model in a conceptual scenario
Short · 4 points · Concept Explanation
A conceptual short question that asks you to apply a biological model or principle to a described scenario and explain the underlying mechanism. This is where clear cause-and-effect reasoning about a biological process is graded.
Explain the mechanism, not just the outcome. "Explain" and "justify" parts score zero without a reason.
Tie the concept to the specifics of the scenario given, not a textbook example.
Use precise vocabulary; a vague answer that gestures at the right idea often misses the rubric point.
06
Argumentation across the section
Long & short · Argumentation practice
Argumentation is not a single question type but the skill the graders reward everywhere: making a claim, supporting it with evidence, and justifying it with reasoning. It carries the most weight in the long questions' conclusion parts and appears in the shorts whenever you are asked to support or refute something.
Claim, evidence, reasoning. A conclusion with no evidence, or evidence with no reasoning, leaves points on the table.
Quote the specific data or feature you are relying on.
When asked to evaluate a claim, commit to support or refute and defend it; hedging earns nothing.
Five FRQ scoring patterns that show up every year
Drawn from published College Board rubrics
Graphs are scored on their conventions. Separate points ride on labeled axes with units, an appropriate and consistent scale, accurately plotted points, the right kind of line or fit, and error bars when standard error is provided. A correct-shaped graph missing units still loses those points.
Justifications must cite the data. "Explain," "justify," and "support" parts score zero without reasoning tied to the evidence. Name the specific value or trend and connect it to your claim, rather than restating biology you already know.
Correlation is not causation. Concluding that one variable causes another from a graph that only shows they move together is a routine single-point loss. Say what a controlled design would need before you claim cause.
Chi-square is read against the critical value. Compute the statistic, compare it to the critical value at the stated degrees of freedom and p = 0.05, and then state whether to reject the null hypothesis. Stopping at the number, or misreading degrees of freedom, drops the point.
Answer every part and show reasoning. Partial credit is real: each point is scored against a published rubric, so a blank part earns nothing while an attempt can earn several. Keep going even if one calculation breaks.
Released FRQs, the formula sheet, and scoring guides
Official College Board materials
The College Board posts each year's FRQs along with scoring guidelines and sample student responses on AP Central. Work through at least the most recent three administrations under timed conditions, then grade yourself against the published rubric to see exactly where each point is awarded.
A formula and equations sheet is provided during the exam, covering statistics (mean, standard deviation, standard error), the chi-square test and critical values, Hardy-Weinberg, water potential, and more. Know what is on it so you are not memorizing formulas you will be handed. Our AP Biology formula sheet reference walks through each one and when to reach for it.
Stop losing FRQ points to the same misconceptions
FRQ losses are rarely about not knowing biology. They are almost always a specific habit: leaving units off a graph, concluding causation from a correlation, misreading chi-square degrees of freedom, or stating a conclusion without citing the data that support it. Practice the question types and see which ones are costing you points.
Six. The AP Biology free response section has two long questions worth 9 points each and four short questions worth 4 points each, for 34 raw points across 90 minutes. Every answer is handwritten in a paper booklet, and the section is worth 50 percent of the exam score.
How much is each AP Biology FRQ worth?
Each of the two long questions is worth 9 points and each of the four short questions is worth 4 points, for 34 raw points total. The free response section contributes 50 percent of your exam score, equal to the multiple choice section.
How long should I spend on each AP Biology FRQ?
You have 90 minutes for six questions. A workable split is roughly 25 minutes on each long question and about 10 minutes on each short question. The long questions carry the graphing and statistics work and reward the extra time.
What do the AP Biology free response questions test?
Six AP Biology science practices are assessed across the section: Concept Explanation, Visual Representations, Questions and Methods (experimental design), Representing and Describing Data, Statistical Tests and Data Analysis, and Argumentation. The two long questions center on interpreting and evaluating experimental results, including graphing and statistics; the four short questions cover experimental design, analyzing a model or visual, analyzing data, and applying a concept in a conceptual scenario.
Is a formula sheet provided on the AP Biology exam?
Yes. A formula and equations sheet is provided, covering statistics such as mean, standard deviation, and standard error, the chi-square test and its critical values, Hardy-Weinberg, water potential, and more. You do not need to memorize these formulas, but you should know when and how to use each one.
How do I earn full credit on an AP Biology graph?
Graphs are scored on their conventions: label both axes with units, choose a consistent scale that uses the grid, plot points accurately, draw the appropriate line or best fit, and add error bars when standard error is given. Missing any of these can cost a point even when the overall shape is correct.
