BIOLOGY-A-SALTERS-NUFFIELD-9BN0 · Pearson Edexcel A Level
BIOLOGY-A-SALTERS-NUFFIELD-9BN0/11
Paper 1
Biology A Salters Nuffield · June 2022 · Variant 1
Relative difficulty
Analysis source: Pearson Edexcel
Analysis aligned to the official syllabus and assessment design.
3.8 / 5
300
360 min
Immunological Mechanisms, Photosynthesis Energetics, and Neuromuscular Synaptic Pathways
Cohort performance
Session statistics from official examination reports
Total marks
300
Duration
360 min
Session difficulty
3.8 / 5
Key examiner messages
Top priorities from the principal examiner before you revise
High-scoring candidates showed a solid foundation in the mechanical pathways of molecular biology and cellular energetics.
Excellent marks were achieved in questions testing protein synthesis and organelle interactions (rER-to-Golgi vesicular transport), biochemical cycles (the light-dependent reactions of photosynthesis and carbon fixation via Rubisco), and neural transmission pathways.
Mathematical fluency also proved to be a decisive differentiator, with significant marks allocated to percentage changes, enzyme rates, and statistical deductions like Chi-squared (χ2\chi^2χ2) and Student's t-tests.
Question difficulty map
How candidates performed on each question in this series
No data available in official reports
Assessment objectives
Skill and AO weighting from official examiner commentary
Skill weighting
Shows the skill mix this paper tested most heavily.
Recall & Understanding
Weight: 4100%Knowledg
Weight: 375%Application of
Weight: 250%Evaluation & Analysis
Weight: 125%
Method marks watchlist
Where working, steps, or method marks were commonly lost
No data available in official reports
Recurring mistakes across years
Themes examiners flag in multiple recent sessions for this subject
No data available in official reports
Question choice intelligence
Mean scores and popularity for optional questions (HKDSE electives)
No data available in official reports
Level exemplars
What candidate scripts at each grade level looked like
No data available in official reports
Grade & admission context
How marks relate to grade thresholds and entry standards
Report type
Examiner report — national grade boundaries and question-level commentary
Level A*
Approx. 62% of maximum mark
Level A
Approx. 52% of maximum mark
Level B
Approx. 43% of maximum mark
Level C
Approx. 34% of maximum mark
Level D
Approx. 25% of maximum mark
Level E
Approx. 16% of maximum mark
Deep insights
What top candidates did
Techniques and approaches examiners rewarded in this series
No data available in official reports
Command word playbook
How to match each command word to the expected response style
Give reasons and link mechanism to outcome; each point needs a because/so chain.
State features in sequence or list observable properties — do not explain causes unless asked.
Show formula, substitution, and unit; method marks need visible working.
Match the expected response style for “Devise” questions.
Weigh arguments for and against with evidence; end with a supported judgement.
Match the expected response style for “Deduce” questions.
Present multiple perspectives with evidence; balance breadth and depth.
Match the expected response style for “Comment” questions.
Time traps
Sections where candidates spent disproportionate time relative to marks
Min per mark: 20
Min per mark: 20
Syllabus traceability
Topics linked to questions and mark weighting in this session
Immunity, Infection and Forensics (Paper 1)
49 marks this session
Grey Matter (Paper 2)
48 marks this session
Run for your Life (Paper 2)
44 marks this session
On the Wild Side (Paper 1)
40 marks this session
Genes and Health (Paper 2)
30 marks this session
MCQ trap analytics
Commonly chosen wrong options from examiner commentary
No data available in official reports
Topic heatmap across years
Mark concentration by topic and exam year for this subject
Mark intensity
On the Wild Side (Paper 1: The Natural Environment and Species Survival)
Grey Matter (Paper 2: Energy, Exercise and Co-ordination)
On the Wild Side
Run for your Life (Paper 2: Energy, Exercise and Co-ordination)
Immunity, Infection and Forensics (Paper 1)
Immunity, Infection and Forensics (Paper 1: The Natural Environment and Species Survival)
Grey Matter
Grey Matter (Paper 2)
Difficulty trend
How session difficulty has shifted across recent years
Paper comparison
Marks and duration breakdown across papers in this session
Paper 1: The Natural Environment and Species Survival:
Paper 2: Energy, Exercise and Co-ordination:
Paper 3: General and Practical Applications in Biology:
Marks you can still earn
Where valid approaches outside the mark scheme may still gain credit
No data available in official reports
Practise what examiners flagged
Target weak topics from this report inside the Revui app
Immunity, Infection and Forensics (Paper 1)
49 marks this session
Practise in RevuiGrey Matter (Paper 2)
48 marks this session
Practise in RevuiRun for your Life (Paper 2)
44 marks this session
Practise in RevuiOn the Wild Side (Paper 1)
40 marks this session
Practise in RevuiGenes and Health (Paper 2)
30 marks this session
Practise in RevuiSelf-diagnostic checklist
Key actions before you sit this paper — copy and tick off as you revise
- 1Message
High-scoring candidates showed a solid foundation in the mechanical pathways of molecular biology and cellular energetics.
- 2Message
Excellent marks were achieved in questions testing protein synthesis and organelle interactions (rER-to-Golgi vesicular transport), biochemical cycles (the light-dependent reactions of photosynthesis and carbon fixation via Rubisco), and neural transmission pathways.
- 3Message
Mathematical fluency also proved to be a decisive differentiator, with significant marks allocated to percentage changes, enzyme rates, and statistical deductions like Chi-squared (χ2\chi^2χ2) and Student's t-tests.
Teacher briefing pack
One-page session summary for tutors and classroom review
June 2022 2022
Biology A Salters Nuffield
High-scoring candidates showed a solid foundation in the mechanical pathways of molecular biology and cellular energetics. Excellent marks were achieved in questions testing protein synthesis and organelle interactions (rER-to-Golgi vesicular transport), biochemical cycles (the l
High-scoring candidates showed a solid foundation in the mechanical pathways of molecular biology and cellular energetics.
Excellent marks were achieved in questions testing protein synthesis and organelle interactions (rER-to-Golgi vesicular transport), biochemical cycles (the light-dependent reactions of photosynthesis and carbon fixation via Rubisco), and neural transmission pathways.
Mathematical fluency also proved to be a decisive differentiator, with significant marks allocated to percentage changes, enzyme rates, and statistical deductions like Chi-squared (χ2\chi^2χ2) and Student's t-tests.
- Total marks
- 300
- Duration
- 360 min
- Session difficulty
- 3.8 / 5
Session analysis
High-scoring candidates showed a solid foundation in the mechanical pathways of molecular biology and cellular energetics. Excellent marks were achieved in questions testing protein synthesis and organelle interactions (rER-to-Golgi vesicular transport), biochemical cycles (the light-dependent reactions of photosynthesis and carbon fixation via Rubisco), and neural transmission pathways. Mathematical fluency also proved to be a decisive differentiator, with significant marks allocated to percentage changes, enzyme rates, and statistical deductions like Chi-squared (χ2\chi^2χ2) and Student's t-tests.
Updated Jun 14, 2026
Paper breakdown
Paper 1: The Natural Environment and Species Survival:
Paper 2: Energy, Exercise and Co-ordination:
Paper 3: General and Practical Applications in Biology:
Top chapters
Exam structure insights
Marks by chapter
See where the marks were concentrated so revision time goes to the highest-value topics.
Mark accessibility
Estimate which marks were basic, mid-level, or high-difficulty.
73% within easy or medium reach
Command word frequency
Spot common command words so answers match the expected response style.
Question type mix
Compare the mark share of each paper section and question type.
Structured Short Answer
231·65·77%
Extended Level of Response
(Asterisk)
54·9·18%
Multiple Choice
15·15·5%
Study ROI
Bigger bubbles recur more often; higher bubbles carry more marks, helping you rank revision priorities.
Time vs marks
Compare marks with suggested time allocation to plan exam pacing.
Paper 1 (The Natura…1
0.05 m/minPaper 2 (Energy, Ex…1
0.05 m/minTotal marks
2
Total time
40 min
Avg pace
0.05
Next-year prediction
Topics worth watching next year, with the reason shown directly below each bar.
Epigenetics, Methylation, and Histone Acetylation
85%85%
Atherosclerosis and Cardiovascular Risk Assessment
80%80%
Allopatric Speciation and Reproductive Isolation Barriers
75%75%
Examiner notes & key calculations
- Unit Conversion Errors: Many candidates lost marks on straightforward calculation tasks because they struggled with scale conversions, particularly converting nanometers (nmnmnm) to micrometers (μm\mu mμm).
- Vague Explanations: Generic phrases such as 'affects the cell' or 'enzymes are turned off' were routinely penalized. Examiners looked for precise terms like denaturation of the active site or altered tertiary conformation due to modified R-group bonds.
- Immunology Confusion: In questions on HIV and Tuberculosis, a clear distinction between the roles of T-helper cells, B-cells, and cytotoxic killer cells was vital; candidates frequently conflated these, losing key analytical marks.
- Experimental Logic: On 'Devise' questions, candidates often failed to specify independent, dependent, and strictly controlled abiotic variables, leading to incomplete experimental protocols.
Exam tips
Paper format
- Duration
- 2h
- Total marks
- 100
- Weighting
- 33.3%
- Question types
- Multiple Choice, Short Open-Response, Structured Data Analysis, Mathematical Calculation, Level-of-Response Extended Writing
Analysis is paraphrased for study purposes. Always verify against the official examiner report and mark scheme.