GATEWAY-SCIENCE-BIOLOGY-A-J247 · Cambridge OCR GCSE (9–1)
GATEWAY-SCIENCE-BIOLOGY-A-J247/31
J247/03: Paper 3 (Higher Tier)
Gateway Science Biology A · June 2024 · Variant 1
Relative difficulty
Analysis source: OCR
Analysis aligned to the official syllabus and assessment design.
3.8 / 5
180
210 min
Cell level systems, gene expression, protein synthesis, and experimental data analysis
Cohort performance
Session statistics from official examination reports
Total marks
180
Duration
210 min
Session difficulty
3.8 / 5
Key examiner messages
Top priorities from the principal examiner before you revise
Marks are densely concentrated in What Happens in Cells (covering DNA transcription/translation, genetic engineering, and enzymes) and Inheritance.
Quantitative questions account for a significant proportion of the total paper mark.
Key calculation types tested include percentage decreases (e.g., calculating elephant population drops), 3 significant figure rounding in magnification formulas, ratio determination for genetic crosses and eye-to-body mass, and orders of magnitude conversions.
Mastery of the 6-mark Level of Response (LoR) questions remains essential to achieving Grade 7 to 9.
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.
AO1 - Knowledge w
Weight: 4100%Knowledge & AO2 -
Weight: 375%ApplicationAO3 -
Weight: 250%Analysis, e
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 9
Approx. 79% of maximum mark
Level 8
Approx. 73% of maximum mark
Level 7
Approx. 67% of maximum mark
Level 6
Approx. 58% of maximum mark
Level 5
Approx. 48% of maximum mark
Level 4
Approx. 39% of maximum mark
Level 3
Approx. 34% 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.
Apply knowledge to an unfamiliar context; concise, practical points score best.
Match the expected response style for “State” questions.
Time traps
Sections where candidates spent disproportionate time relative to marks
Min per mark: 1.3
Min per mark: 1.3
Min per mark: 1.1
Min per mark: 1.1
Syllabus traceability
Topics linked to questions and mark weighting in this session
What happens in cells (and what do cells need)?
42 marks this session
Monitoring and maintaining health
25 marks this session
Inheritance
22 marks this session
Natural selection and evolution
18 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
What happens in cells (and what do cells need)?
Monitoring and maintaining health
Inheritance
Natural selection and evolution
Paper comparison
Marks and duration breakdown across papers in this session
Paper 3 (Higher Tier): J247/04:
Paper 4 (Higher Tier):
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
What happens in cells (and what do cells need)?
42 marks this session
Practise in RevuiMonitoring and maintaining health
25 marks this session
Practise in RevuiInheritance
22 marks this session
Practise in RevuiNatural selection and evolution
18 marks this session
Practise in RevuiSelf-diagnostic checklist
Key actions before you sit this paper — copy and tick off as you revise
- 1Message
Marks are densely concentrated in What Happens in Cells (covering DNA transcription/translation, genetic engineering, and enzymes) and Inheritance.
- 2Message
Quantitative questions account for a significant proportion of the total paper mark.
- 3Message
Key calculation types tested include percentage decreases (e.g., calculating elephant population drops), 3 significant figure rounding in magnification formulas, ratio determination for genetic crosses and eye-to-body mass, and orders of magnitude conversions.
- 4Message
Mastery of the 6-mark Level of Response (LoR) questions remains essential to achieving Grade 7 to 9.
Teacher briefing pack
One-page session summary for tutors and classroom review
June 2024 2024
Gateway Science Biology A
Marks are densely concentrated in What Happens in Cells (covering DNA transcription/translation, genetic engineering, and enzymes) and Inheritance. Quantitative questions account for a significant proportion of the total paper mark. Key calculation types tested include percentage
Marks are densely concentrated in What Happens in Cells (covering DNA transcription/translation, genetic engineering, and enzymes) and Inheritance.
Quantitative questions account for a significant proportion of the total paper mark.
Key calculation types tested include percentage decreases (e.g., calculating elephant population drops), 3 significant figure rounding in magnification formulas, ratio determination for genetic crosses and eye-to-body mass, and orders of magnitude conversions.
- Total marks
- 180
- Duration
- 210 min
- Session difficulty
- 3.8 / 5
Session analysis
Marks are densely concentrated in What Happens in Cells (covering DNA transcription/translation, genetic engineering, and enzymes) and Inheritance. Quantitative questions account for a significant proportion of the total paper mark. Key calculation types tested include percentage decreases (e.g., calculating elephant population drops), 3 significant figure rounding in magnification formulas, ratio determination for genetic crosses and eye-to-body mass, and orders of magnitude conversions. Mastery of the 6-mark Level of Response (LoR) questions remains essential to achieving Grade 7 to 9. These questions evaluate deep understanding of the impact of DNA triplet mutations on enzymes and blood glucose control, as well as the dual impact of natural selection and lethal alleles on elephant herds.
Updated Jun 14, 2026
Paper breakdown
Paper 3 (Higher Tier): J247/04:
Paper 4 (Higher Tier):
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.
72% 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.
Short Answer Questions
114·38·63%
Extended Response
(Level of Response)
36·6·20%
Multiple Choice Questions
30·30·17%
Study ROI
Bigger bubbles recur more often; higher bubbles carry more marks, helping you rank revision priorities.
Difficulty trend
Compare difficulty across recent years.
Time vs marks
Compare marks with suggested time allocation to plan exam pacing.
J247/03 Section A (
0.75 m/minJ247/03 Section B (
0.88 m/minJ247/04 Section A (
0.75 m/minJ247/04 Section B (
0.88 m/minTotal marks
180
Total time
210 min
Avg pace
0.86
Next-year prediction
Topics worth watching next year, with the reason shown directly below each bar.
Photosynthesis and Respiration Core Practicals
5%5%
Feeding the human race (Global challenges)
4%4%
Examiner notes & key calculations
- Insufficient Precision in DNA Transcription/Translation: Students frequently confuse the roles of transcription and translation, or fail to state that mutations alter the triplet code, thereby altering the specific sequence of amino acids and subsequent folding of the active site.
- Weak Scientific Drawing Protocols: Marks are routinely lost for sketchy, shaded, or unlabelled diagrams. A sharp pencil, single continuous lines, and no shading are mandatory requirements.
- Incomplete Osmosis Explanations: When explaining mass increases in beetroot, candidates often omit referencing the movement of water specifically by osmosis from a region of higher water potential (dilute solution) to a lower water potential (inside the cell).
- Failing to Link Calculations to Conclusions: In multi-step calculation questions (such as comparing disease risk in patients with and without varicose veins), students often perform the math but fail to write the final comparative conclusion demanded by the prompt.
Exam tips
Paper format
- Duration
- 1h 45min
- Total marks
- 90
Analysis is paraphrased for study purposes. Always verify against the official examiner report and mark scheme.