BIOLOGY-B-ADVANCING-BIOLOGY-H422 · Cambridge OCR A Level
BIOLOGY-B-ADVANCING-BIOLOGY-H422/11
Paper 1
Biology B Advancing Biology · June 2023 · Variant 1
Relative difficulty
Analysis source: OCR
Analysis aligned to the official syllabus and assessment design.
3.5 / 5
270
360 min
Photosynthesis and Agricultural Biomass Efficiency
Cohort performance
Session statistics from official examination reports
Total marks
270
Duration
360 min
Session difficulty
3.5 / 5
Key examiner messages
Top priorities from the principal examiner before you revise
A significant portion of marks resided in Photosynthesis and Environmental Management and the Immune System.
In H422/01, structured questions regarding agricultural productivity, ruminant digestion, and plant reproduction (fertilisation) offered high-tariff rewards for clear, sequential writing.
In H422/02, the Advance Notice question on therapeutic monoclonal antibodies provided ample opportunity for students who mastered the core structural details of immunoglobulin molecules (such as variable vs.
constant regions) and the physiological differences between mouse and humanised antibodies.
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.
Conceptual Knowledge
Weight: 5100%Mathematical & Calculation
Weight: 360%Experimental
Weight: 240%Analysis & E
Weight: 120%
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. 63% of maximum mark
Level A
Approx. 55% of maximum mark
Level B
Approx. 47% of maximum mark
Level C
Approx. 40% of maximum mark
Level D
Approx. 32% of maximum mark
Level E
Approx. 25% 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.
Weigh arguments for and against with evidence; end with a supported judgement.
Apply knowledge to an unfamiliar context; concise, practical points score best.
Match the expected response style for “State” questions.
Present multiple perspectives with evidence; balance breadth and depth.
Time traps
Sections where candidates spent disproportionate time relative to marks
Min per mark: 1.5
Min per mark: 1.3
Min per mark: 1.2
Syllabus traceability
Topics linked to questions and mark weighting in this session
Photosynthesis, food production and management of the environment
60 marks this session
The immune system
23 marks this session
The nervous system and the identification and consequences of damage
19 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
Photosynthesis, food production and management of the environment
The heart and monitoring heart function
The developing individual: meiosis, growth and development
The immune system
The impact of population increase
The nervous system and the identification and consequences of damage
Cellular respiration
The development of species: evolution and classification
Paper comparison
Marks and duration breakdown across papers in this session
H422/01 Fundamentals of biology: H422/02 Scientific literacy in biology: H422/03 Practical skills 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
Photosynthesis, food production and management of the environment
60 marks this session
Practise in RevuiThe immune system
23 marks this session
Practise in RevuiThe nervous system and the identification and consequences of damage
19 marks this session
Practise in RevuiSelf-diagnostic checklist
Key actions before you sit this paper — copy and tick off as you revise
- 1Message
A significant portion of marks resided in Photosynthesis and Environmental Management and the Immune System.
- 2Message
In H422/01, structured questions regarding agricultural productivity, ruminant digestion, and plant reproduction (fertilisation) offered high-tariff rewards for clear, sequential writing.
- 3Message
In H422/02, the Advance Notice question on therapeutic monoclonal antibodies provided ample opportunity for students who mastered the core structural details of immunoglobulin molecules (such as variable vs.
- 4Message
constant regions) and the physiological differences between mouse and humanised antibodies.
Teacher briefing pack
One-page session summary for tutors and classroom review
June 2023 2023
Biology B Advancing Biology
A significant portion of marks resided in Photosynthesis and Environmental Management and the Immune System. In H422/01, structured questions regarding agricultural productivity, ruminant digestion, and plant reproduction (fertilisation) offered high-tariff rewards for clear, seq
A significant portion of marks resided in Photosynthesis and Environmental Management and the Immune System.
In H422/01, structured questions regarding agricultural productivity, ruminant digestion, and plant reproduction (fertilisation) offered high-tariff rewards for clear, sequential writing.
In H422/02, the Advance Notice question on therapeutic monoclonal antibodies provided ample opportunity for students who mastered the core structural details of immunoglobulin molecules (such as variable vs.
- Total marks
- 270
- Duration
- 360 min
- Session difficulty
- 3.5 / 5
Session analysis
A significant portion of marks resided in Photosynthesis and Environmental Management and the Immune System. In H422/01, structured questions regarding agricultural productivity, ruminant digestion, and plant reproduction (fertilisation) offered high-tariff rewards for clear, sequential writing. In H422/02, the Advance Notice question on therapeutic monoclonal antibodies provided ample opportunity for students who mastered the core structural details of immunoglobulin molecules (such as variable vs. constant regions) and the physiological differences between mouse and humanised antibodies.
Updated Jun 14, 2026
Paper breakdown
H422/01 Fundamentals of biology: H422/02 Scientific literacy in biology: H422/03 Practical skills 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.
70% 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
96·48·36%
Level of Response & Extended Writing
90·15·33%
Data Analysis & Calculations
54·18·20%
Multiple Choice Questions
30·30·11%
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.
H422/01 Section A (
0.75 m/minH422/01 Section B (
0.84 m/minH422/03 Practical s
0.67 m/minTotal marks
170
Total time
225 min
Avg pace
0.76
Next-year prediction
Topics worth watching next year, with the reason shown directly below each bar.
Cellular Respiration (Krebs Cycle & Oxidative Phosphorylation)
95%95%
Gene technologies (PCR, Gel Electrophoresis & Microarrays)
88%88%
Water transport in plants (Transpiration pull & Cohesion-tension)
82%82%
Analysis is paraphrased for study purposes. Always verify against the official examiner report and mark scheme.