If you are looking for clear, current information on Cambridge A Level Biology grade boundaries, this guide pulls together the paper structure for syllabus 9700, the grade thresholds Cambridge has published in recent years, the patterns they tend to follow, and the practical question every student is really asking: what raw mark do I need for an A* in Cambridge International A Level Biology?

Cambridge International publishes official grade thresholds for every subject after each session. Those documents are the source of truth — but they are dense, formatted as tables across multiple syllabuses, and rarely give a student the answer they want quickly. Below we summarise how Cambridge A Level Biology 9700 is graded, what the boundaries usually look like, and how to use them while you revise.

Free tool: Use Tutopiya’s Cambridge A Level Biology grade boundary tracker (9700) to enter your raw mark and instantly see the most likely grade band based on published Cambridge thresholds.

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How Cambridge A Level Biology grade boundaries work

A grade boundary is the minimum total raw mark you need to be awarded a particular grade. For Cambridge International A Level Biology (syllabus code 9700), grades range from A* down to E, with anything below the E threshold ungraded.

Three things to remember:

1. Boundaries are set after marking, not before. Cambridge looks at the difficulty of the papers actually sat and the performance of the cohort, then sets thresholds so that a candidate who performed as well as a comparable candidate from a previous series receives the same grade. This is sometimes called grade protection or comparable outcomes.
2. Thresholds change every series. A June 2025 boundary is not the same as a November 2024 boundary. They tend to sit within a band, but the exact mark moves up or down a few points each time.
3. Boundaries are total marks, not percentages. Cambridge publishes them as raw marks out of the total available for the qualification (typically 250 across the four A2 + AS papers, depending on the route), even though students often think in percentages.

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Cambridge A Level Biology paper structure (9700)

You cannot read grade boundaries without knowing the paper structure they apply to. Cambridge International A Level Biology (9700) is assessed across five papers split between AS Level and the full A Level:

Paper	Title	Marks	Duration	Stage
1	Multiple Choice	40	1 h 15 min	AS
2	AS Structured Questions	60	1 h 15 min	AS
3	Advanced Practical Skills	40	2 h	AS
4	A Level Structured Questions	100	2 h	A2
5	Planning, Analysis and Evaluation	30	1 h 15 min	A2

A candidate sitting the full A Level completes all five papers (total 270 marks). A standalone AS Level candidate sits Papers 1, 2 and 3 (total 140 marks) and is awarded an AS grade only.

Cambridge publishes two sets of thresholds each series:

• A Level thresholds (A* / A / B / C / D / E) — applied to the combined raw mark across all papers a full A Level candidate has sat.
• AS Level thresholds (a / b / c / d / e) — applied to AS-only candidates.

When you read the official Cambridge grade thresholds PDF, the column you want depends on whether you are taking the full A Level or just AS.

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What raw mark do I need for an A* in Cambridge A Level Biology?

This is the single most-asked question. Across recent June and November series, the A* threshold for Cambridge A Level Biology 9700 has typically sat somewhere in the 75–85% range of the total marks available — but the exact figure shifts every session.

A few representative observations from published Cambridge thresholds:

• A* has commonly required around 78–82% of total marks in recent A Level Biology 9700 series.
• A has commonly required around 68–73%.
• B has commonly required around 58–63%.
• C has commonly required around 48–53%.
• E (the pass mark) has commonly sat around 30–35%.

Two important caveats:

1. These are typical bands, not predictions. A particular series might sit a few marks above or below.
2. Cambridge publishes thresholds as raw marks, not percentages. A 78% A* in a series with a 250-mark scale is 195/250; in a series with a different total it is a different number. Always work from the published raw-mark threshold.

The Tutopiya grade boundary tracker for Cambridge A Level Biology stores published threshold data and lets you enter your raw mark to see your likely grade band. For the official document, search Cambridge International’s website for “Cambridge International grade thresholds — June 2025” (or the relevant series).

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Why Cambridge A Level Biology boundaries move each series

Three factors drive most of the year-to-year variation:

• Paper difficulty. If a Paper 4 question paper is harder than usual — for example, a particularly demanding genetics or ecology section — Cambridge will lower the A* threshold slightly so candidates are not penalised for sitting a tougher paper.
• Cohort performance. If the global candidate cohort performs unusually well or poorly, the thresholds are adjusted to maintain fair comparison with previous years.
• Practical paper variation. Paper 3 (Advanced Practical Skills) and Paper 5 (Planning, Analysis and Evaluation) are sensitive to specific experiment choices and analysis tasks, and small variations can move the overall threshold.

This is why Cambridge does not publish the boundaries before the series — they have to be set after the marking has been benchmarked against the rest of the cohort.

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How to use grade boundaries while you revise

Grade boundaries are most useful before results day, not after. Three ways to use them during your revision plan:

1. Convert mock and past-paper marks into a target grade

When you sit a past Paper 4 under timed conditions and score 67/100, that number alone tells you very little. Cross-reference it with the published threshold for that paper — or better, with the combined-paper boundary for that series — and you suddenly know whether you are tracking at A, B or C standard. The Cambridge A Level Biology tracker does this conversion automatically when you enter your mark and the paper.

2. Identify the gap to your next grade

If you are scoring 64% on Paper 4 and the historical A boundary is 70%, you know you need to pick up six percentage points — about six more marks — to be on the A border. That is a much more concrete revision target than “do better next time.” Combine the gap with a confidence-rated revision checklist to choose where those marks come from.

3. Sanity-check your predicted grade

Schools issue predicted grades for university applications based on mock exam performance. If your predicted grade looks higher or lower than the boundary maths suggests, raise it with your teacher early — before UCAS or international university deadlines bite.

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Cambridge A Level Biology grade boundaries by paper component

Cambridge publishes component-level thresholds as well as overall thresholds. The component thresholds are useful when you have a Paper 4 mock mark and want to know what an “A standard” performance on Paper 4 specifically looked like in previous series.

Component thresholds typically run a few marks below or above the equivalent percentage of the overall threshold, depending on how that paper performed in that series. They are most useful for:

• Teachers benchmarking mock papers across cohorts.
• Students who want to know whether they are weaker in practical papers (3 and 5) than in theory papers (1, 2 and 4).

For a general student, the overall A Level threshold is the number that matters for your final grade — you can only convert one combined mark, the sum of all your papers.

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How AS Level Biology boundaries connect to the full A Level

If you sit AS in one series and A2 in a later series (the staged route), Cambridge carries your AS marks forward and combines them with your A2 marks for the final A Level award. The A Level threshold is then applied to the combined raw mark across all five papers, not separately to your AS and A2 totals.

This is why a strong AS performance can offset a weaker A2 series — and why a borderline AS grade still leaves the full A Level grade open to a strong A2 finish. Cambridge’s 9700 syllabus document details the staged-versus-linear pathway in full.

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Cambridge A Level Biology grade thresholds: where to find the official numbers

Cambridge International publishes a grade thresholds PDF for each series shortly after results day. The document lists every syllabus, the maximum mark, and the threshold for each grade.

Three reliable routes to the official document:

1. Cambridge International website → Help with results → Grade thresholds (filter by series).
2. Your school’s exam officer receives the document as part of the results pack and can usually share it.
3. Tutopiya’s grade boundary tracker stores the published thresholds for several recent years so you do not need to track down the PDF yourself.

A note on data freshness: the 2026 thresholds for the June 2026 series have not been set at the time of writing — they are released on results day in August 2026. Until then, the most useful reference is the most recent published series (typically November 2025 or June 2025).

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Common mistakes students make with grade boundaries

A handful of errors come up every year:

• Using last year’s threshold as a target without margin. If the A* boundary was 200/270 last June, a 200/270 mock score does not guarantee A*. Aim for a buffer of 8–10 marks above the historical threshold.
• Mixing up component-level and overall thresholds. A “65% A standard” on Paper 4 alone is not the same as “65% A standard” overall — the overall combines all papers, including the practicals.
• Comparing 9700 thresholds to 9701 (Chemistry) or 9702 (Physics). Each science syllabus is graded independently. A* boundaries differ between Biology, Chemistry and Physics, and cross-comparison is misleading.
• Forgetting the grade is set per-series, not per-year. June and November of the same year have separate thresholds.

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Cambridge A Level Biology revision: from threshold to grade

The published thresholds tell you the destination. The route is the same set of evidence-based revision habits that apply to every Cambridge science:

• Past-paper Paper 4 timing practice. Sit a full Paper 4 in 2 hours, marked against the official mark scheme, at least once a fortnight in the final eight weeks. Use the past paper exam timer to enforce timing.
• Practical methodology drilling. Paper 3 and Paper 5 reward precision in describing methods and analysing data. Drill methodology questions specifically — they are where many otherwise strong candidates lose marks.
• Topic-by-topic confidence rating. Use a revision checklist for A Level Biology to mark your confidence in each syllabus topic. Spend the most time on amber and red topics, not the green ones.
• Definition and command-word precision. Examiners reward the exact wording. Revise the Cambridge command words — describe, explain, suggest, evaluate — and the keyword definitions Cambridge expects.

For broader Cambridge A Level Biology preparation, see our deeper guides on Cambridge A Level Biology common mistakes and Cambridge A Level Biology past papers.

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Frequently asked questions

What are Cambridge A Level Biology grade boundaries?

Grade boundaries are the minimum total raw marks required to achieve each grade (A* to E) in Cambridge International A Level Biology 9700. Cambridge publishes them as a table after each series, with separate thresholds for the full A Level and for AS Level only.

What raw mark do I need for an A* in Cambridge A Level Biology 9700?

The A* threshold has typically required around 78–82% of total marks across recent series, but the exact figure changes every session. Use the Tutopiya grade boundary tracker to check the latest published threshold and convert your raw mark.

Are 2026 Cambridge A Level Biology grade boundaries published yet?

No — Cambridge publishes grade thresholds on or around results day. For the June 2026 series, thresholds will be released in August 2026. For revision and target-setting, use the most recent published series as a reference band.

Where can I find the official Cambridge International grade thresholds document?

On the Cambridge International website, under Help with results → Grade thresholds, filtered by series. Your school’s exam officer also holds the document as part of each series’ results pack.

Do AS Level and A Level Biology have separate grade boundaries?

Yes. AS Level (Papers 1, 2, 3) is graded a–e and has its own thresholds. The full A Level (Papers 1–5) is graded A*–E and uses combined-paper thresholds. The AS thresholds are not directly used to award the full A Level grade.

Why do Cambridge Biology boundaries change every series?

Boundaries are adjusted for paper difficulty and cohort performance so that comparable candidates receive comparable grades across series. A harder paper sees the threshold drop slightly; an easier paper sees it rise.

Are Cambridge A Level grade boundaries the same as Edexcel International A Level boundaries?

No. Cambridge (9700) and Pearson Edexcel International A Level Biology have separate thresholds, separate paper structures and separate mark totals. The grades (A*–E) are comparable, but the raw-mark thresholds are not.

Can I use Cambridge thresholds to predict my Cambridge IGCSE Biology grade?

No — IGCSE Biology (0610) and A Level Biology (9700) are different qualifications with separate threshold tables. For IGCSE, see our Cambridge IGCSE Biology grade boundary tracker instead.

What happens if I miss the A* boundary by one mark?

Cambridge does not round up. A candidate one mark below the A* threshold is awarded A. Reviews of marking can be requested through your school exam officer if you believe a paper has been mis-marked, but boundaries themselves are fixed once published.

How accurate is the Tutopiya grade boundary tracker?

The tracker uses published Cambridge International grade thresholds for past series and is for reference only. The 2026 thresholds will be set after the June 2026 series. For confirmed boundaries always check the official Cambridge document.

Does paper choice affect my Cambridge A Level Biology grade?

For 9700 there is no paper option choice — every full A Level candidate sits all five papers. The only variation is whether you sit AS only, staged AS + A2, or linear (all in one series). The combined raw-mark threshold applies to all routes.

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Last reviewed: 29 April 2026. Cambridge International grade thresholds are released on results day for each series. Always verify current boundaries on the official Cambridge International website or with your school exam officer.

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