How to crack
the FRQ.
Section II / 90 min / 6 questions / 50% of your score
The six free-response slots have been remarkably stable across 2023, 2024, and 2025. The slot tells you what skill is being tested before you read a single word. Walk in with templates pre-loaded, translate the task verb, lead with the answer, cite the data, move on.
/ 01The six question slots
Each slot tests a fixed skill. Click a card to see the recurring sub-structure inside it. The skill is the same year over year — only the surface biology changes.
Recurring sub-structure:
- "Describe the function of [organelle/process]" — free point.
- Identify variables (IV / DV / control) — 2–3 pts.
- Read the figure — describe direction of change.
- Calculation — show work, box answer.
- Apply the model to a new scenario.
- Cross-concept synthesis to a unit outside the question's main topic.
Same structure as Q1, but 3 of the 9 points are a graph. Build the graph first; it anchors your answers to the other parts.
- Construct the graph (3 pts).
- Identify a variable / treatment effect from the data.
- Predict + justify a follow-up effect.
- Cross-concept synthesis to a different unit.
Four discrete tasks every year. Almost always:
- One basic biology fact (keystone species, transport, biodiversity).
- "Identify a control group" or "Justify a control choice".
- "State the null hypothesis" — use the template.
- A predict + justify pair.
Pure-content question with a real-world scenario. No data analysis — apply one big idea cleanly.
- Describe an evolutionary / ecological / biochemical concept.
- Explain a mechanism the stem implies.
- Predict an effect of a change.
- Justify the prediction.
You're handed a diagram (pathway, cladogram, gene structure). Half the answer is reading the picture correctly — trace every arrow before writing.
- Identify a labeled component or product.
- Explain what regulation/feedback the diagram shows.
- Predict what happens if a step breaks.
- Sometimes mark an X on the diagram itself.
A graph (often non-standard — histograms, box plots) with quick reads.
- Identify a value (read the graph).
- Describe a trend or comparison.
- Support a claim using specific numbers.
- Explain the biological reason for the pattern.
/ 02The task-verb decoder
Every rubric point is anchored to a bolded verb. Misread the verb and you write the wrong kind of answer no matter how much biology you know. Click a verb to see what the rubric actually wants — and what kills the point.
/ 03Templates that score reliably
These come straight from the official rubrics. Click a card to flip it — front is the prompt situation, back is the model template. Memorize until automatic.
/ 04The Q2 graphing rubric
Three points on Q2 are pure execution — graders are checking three boxes. Hit all three and you've banked 33% of the question before you've written a sentence.
Correct graph type
Bar (or modified bar) for categorical IV — treatments, species, genotypes. Line for continuous IV — time, temperature, concentration.
Data + error bars accurately plotted
Plot every data point. If the table shows ±SE, ±2SE, or ±SEM, draw error bars of that magnitude.
Appropriately labeled
Both axes labeled with variable name + units. Legend if multiple data series. IV on x-axis, DV on y-axis — every time.
The TAILS rules
/ 05The 90-minute strategy
Use the first ten minutes to triage: read all six, rank easiest to hardest, then start with the easiest (often a short FRQ). Banking the 16 short-FRQ points early protects your confidence and your clock. Click any segment for what to do during it — or hit simulate and watch the cursor sweep at 60× speed.
/ 06What gets tested where
Three years of released FRQs, mapped by topic. The right-hand columns mark which question(s) hit each topic. Hover a green chip to see the question reference.
/ 07The top 10 point-losers
Synthesized from chief reader reports and practitioner guides. Tap any card you recognize as a habit you've slipped into — the counter at the bottom shows your error fingerprint.
/ 09Exam-day checklist
For every part you tackle, run this loop before you write a sentence. Then before you submit, run the after-list.
Before writing any part
Before submitting
The cheat card.
Read the verb. Lead with the answer. Cite the data. Move on.
Verbs
Identify → one short answer
Describe → what is happening
Explain → mechanism / why
Justify → claim + evidence link
Predict → direction of change
Calculate → setup + work + boxed answer
Graph (Q2)
TAILS: Title, Axes, Intervals, Labels, Scale.
IV on x. DV on y. Bar = categorical. Line = continuous.
Error bars
Overlap → no significant difference.
No overlap → significant difference.
Justify = CER
Claim → Evidence → Reasoning. For "Explain", use the word because.
Null hypothesis
"There will be no difference in [DV] between [groups]."
Control purpose
"Allows researchers to attribute differences to [the treatment] rather than other variables."
Allopatric speciation
Geographic isolation → no gene flow → different selective pressures → divergent allele frequencies.
Keystone removal
Reduces biodiversity → reduces resilience → ecosystem can collapse.
Receptor in membrane
The portion inside the bilayer is nonpolar / hydrophobic.
Active site
Shape and chemistry complementary to substrate. Induced fit lowers activation energy.
Feedback inhibition
Product binds an allosteric site → enzyme changes shape → substrate can't bind active site.
Time
25 / 25 / 10 / 10 / 10 / 10. Don't leave blanks. Each rubric point is binary.