Current syllabus · first assessment 2028

A-Level Biology AS Study Guide & Review

Prepare for Cambridge International AS Biology 9700 through connected molecular, cellular and organism mechanisms, precise structured responses, accurate microscopy, practical investigation and evidence-based data interpretation.

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  1. 01Learn concepts
  2. 02Practise questions
  3. 03Review mistakes

How to study Cambridge AS Biology 9700

Cambridge AS Biology improves when each Topic links observable evidence to molecular or cellular mechanism and then to organism function. Use the AS syllabus map to retrieve structures, bonds, processes and terminology, then apply them to unfamiliar diagrams, experiments and data. Practise structure–function chains across cells, transport, gas exchange, infectious disease and immunity rather than memorizing isolated definitions.

Rebuild a weak mechanism in Concept and check precise retrieval in Mastery before applying it in the Question Bank. Mark the first failure as knowledge, sequence, structure–function link, command word, calculation, graph, variable, control, precision, conclusion or evaluation. Repair that step and answer a matched Paper 1, Paper 2 or practical-style task without importing A2 content.

Practise AS Biology through mechanisms and evidence

Combine molecular and cellular reasoning, organism transport, disease and immunity, command-word responses, descriptive mathematics and Paper 3 practical skills across the exact AS scope.

Cells, molecules and enzymes

Microscopy, cell structure, biological tests, carbohydrates, lipids, proteins, water and enzyme action

Move between labelled structures, molecular features and observable tests or reactions. Explain how bonding and shape determine function, calculate magnification or rates with units and design enzyme investigations using an appropriate range, repeats, controls and a justified dependent measure.

Practise cells and molecules

Membranes, mitosis and gene expression

Fluid mosaic membranes, transport, cell cycle, DNA replication and protein synthesis

Order each mechanism by location, inputs, outputs and causal purpose. Distinguish similarly named transport processes and mitotic stages, connect membrane structure to movement and trace information from DNA replication through transcription and translation without skipping the biological link.

Practise cell processes

Transport and gas exchange

Plant transport tissues, mass flow, mammalian circulation, blood gases, heart and gas-exchange surfaces

Build annotated structure–function diagrams and trace gradients, pressure, water, assimilates, blood and respiratory gases across scales. Use data or graph evidence to justify each mechanism, and separate description of a trend from explanation of its biological cause.

Practise transport

Disease, antibiotics and immunity

Pathogens, transmission, disease control, antibiotic action and resistance, immune responses, antibodies and vaccination

Separate pathogen, transmission route, prevention and treatment evidence; explain resistance through selection without medical advice. Compare innate and specific responses, primary and secondary responses and antibody or vaccination mechanisms using precise cells, molecules, timing and evidence.

Practise disease and immunity

Paper 3 and AS data skills

Variables, controls, microscopy, tables, graphs, calculations, conclusions, errors and improvements

Plan feasible ranges, intervals, repeats and standardised variables; record raw and processed data with units and consistent precision; plot and calculate accurately; identify anomalies and limitations; bound the conclusion and propose specific improvements that address random or systematic problems.

Practise practical skills

Where to start

Begin with one known weak Topic or use a mixed diagnostic to reveal the earliest repeated knowledge, application, data or practical-skills failure.

Choose your starting point

  1. I know the weak Topic

    Open its exact group and identify the structure, mechanism, evidence, command word and calculation or practical skill required.

    Browse AS Topics 1–11

  2. I do not know what is weak

    Take a mixed diagnostic and classify the first repeated AO1, AO2, data or practical error before broad review.

    Start a diagnostic

Choose the right AS starting point

  1. Build the mechanism

    Draw or describe the structure, order the process and explain each causal link with precise biological terminology.

    Review a Concept

  2. Retrieve and apply

    Recall without notes, then transform information, calculate, interpret a graph or apply the mechanism to unfamiliar evidence.

    Check Mastery

  3. Mark and repair

    Match the command word, compare against evidence and correct the first failed knowledge, reasoning, data or practical step.

    Practise questions

Explore Cambridge AS Biology Topics 1–11

Navigate 26 local Topics across the eleven official AS content groups plus dedicated practical and mathematical skill groups. The map follows syllabus Version 1 for exams in 2028, 2029 and 2030 and excludes A2 Topics 12–19.

13
syllabus groups
26
mapped topics

1. Cell Structure

Open unit questions
1.1 The Microscope in Cell Studies1.2 Cells as Basic Units of Living Organisms

2. Biological Molecules

Open unit questions
2.1 Testing for Biological Molecules2.2 Carbohydrates and Lipids2.3 Proteins2.4 Water

3. Enzymes

Open unit questions
3.1 Mode of Action3.2 Factors Affecting Enzyme Action

4. Cell Membranes and Transport

Open unit questions
4.1 Fluid Mosaic Membranes4.2 Movement Into and Out of Cells

5. The Mitotic Cell Cycle

Open unit questions
5.1 Replication and Division5.2 Chromosome Behaviour in Mitosis

6. Nucleic Acids and Protein Synthesis

Open unit questions
6.1 Structure of Nucleic Acids and DNA Replication6.2 Protein Synthesis

7. Transport in Plants

Open unit questions
7.1 Structure of Transport Tissues7.2 Transport Mechanisms

8. Transport in Mammals

Open unit questions
8.1 The Circulatory System8.2 Transport of Oxygen and Carbon Dioxide8.3 The Heart

9. Gas Exchange

Open unit questions
9.1 The Gas Exchange System

10. Infectious Diseases

Open unit questions
10.1 Infectious Diseases10.2 Antibiotics

11. Immunity

Open unit questions
11.1 The Immune System11.2 Antibodies and Vaccination

Practical assessment skills

Open unit questions
Paper 3 Advanced Practical Skills

Mathematical and statistical skills

Open unit questions
AS and A Level mathematical requirements

Cambridge AS Biology 9700 assessment

Standalone AS candidates take Papers 1–3 in the same series: multiple choice, structured questions and a timetabled laboratory practical covering AS Topics 1–11 and practical skills.

Paper / componentQuestionsTime% of grade
Paper 1 Multiple Choice40 four-choice questions40 marksWritten multiple-choice questions assess AS content through equal AO1 knowledge and AO2 application demand.How to prepare: Use mechanism, units and evidence to eliminate options; practise under time without reducing revision to recognition alone.1 hour 15 minutes31% of AS Level
Paper 2 AS Level Structured QuestionsStructured questions60 marksWritten structured questions assess AS content through equal AO1 knowledge and AO2 handling, application and evaluation.How to prepare: Match command words, select relevant biological detail, show causal links and use diagrams, calculations and unfamiliar evidence precisely.1 hour 15 minutes46% of AS Level
Paper 3 Advanced Practical Skills2 or 3 practical questions40 marksA timetabled laboratory practical assesses investigations and light microscopy entirely through AO3 experimental skills.How to prepare: Rehearse variables, ranges, repeats, measurement, microscopy, tables, graphs, analysis, conclusions, limitations and feasible improvements as one continuous workflow.2 hours23% of AS Level

SourceCambridge International · Cambridge International AS & A Level Biology 9700 syllabus9700 · Version 1 · exams 2028, 2029 and 2030

Cambridge AS Biology 9700 questions

Standalone AS covers official Topics 1–11 and Papers 1, 2 and 3. A2 adds Topics 12–19 and Papers 4 and 5 for the full A Level route. Practical and mathematical skill groups support the AS content map but are not extra Biology content Topics.

Treat each command word as a response contract. State or identify briefly; describe observable features or trends; explain with linked biological reasons; compare both sides; calculate with working and units; and evaluate using evidence, limitations and a justified judgment. Use the exact wording in the current syllabus glossary.

The syllabus expects calculator use for arithmetic, roots, reciprocals, logarithms and means, while Cambridge calculator guidance excludes graphing, algebraic, stored-text and communication features. No AS Biology formula or data booklet is named. Recheck the paper front and current additional-materials list for each exam series.

No. Cambridge publishes a selection of past papers, examiner reports and specimen material but warns that older papers may not reflect the current syllabus. Align each question to a current AS objective and skill before use; do not claim a dedicated 2028 specimen set unless Cambridge publishes and verifies it.