BIOLOGY-YBI11 · Pearson Edexcel International A Level
BIOLOGY-YBI11/11
Paper 1
Biology · 2023 · Variant 1
Relative difficulty
Analysis source: Pearson Edexcel
Analysis aligned to the official syllabus and assessment design.
3.5 / 5
440
550 min
Plant Structure, Reproduction, and Integrative Coordination
Cohort performance
Session statistics from official examination reports
Total marks
440
Duration
550 min
Session difficulty
3.5 / 5
Key examiner messages
Top priorities from the principal examiner before you revise
A comprehensive analysis of the January 2023 Pearson Edexcel International Advanced Level Biology examination series (Units 1 to 6).
The papers evaluated student competency across core biochemical, cellular, metabolic, and physiological concepts alongside advanced practical and investigative procedures.
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.
Knowledge & Understanding
Weight: 4100%Recall
Weight: 375%Application &
Weight: 250%Experimental &
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. 90% of maximum mark
Level A
Approx. 80% of maximum mark
Level B
Approx. 70% of maximum mark
Level C
Approx. 60% of maximum mark
Level D
Approx. 50% of maximum mark
Level E
Approx. 40% 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.
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: 2
Min per mark: 1.6
Min per mark: 1.6
Min per mark: 1.2
Min per mark: 1.2
Min per mark: 1.1
Syllabus traceability
Topics linked to questions and mark weighting in this session
Coordination, Response and Gene Technology
65 marks this session
Plant Structure and Function, Biodiversity and Conservation
65 marks this session
Membranes, Proteins, DNA and Gene Expression
60 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
Plant Structure and Function, Biodiversity and Conservation
Coordination, Response and Gene Technology
Membranes, Proteins, DNA and Gene Expression
Respiration, Muscles and the Internal Environment
Microbiology, Immunity and Forensics
Molecules, Transport and Health
Energy Flow, Ecosystems and the Environment
Difficulty trend
How session difficulty has shifted across recent years
Paper comparison
Marks and duration breakdown across papers in this session
WBI11/01 Unit 1: Molecules, Diet, Transport and Health: WBI12/01 Unit 2: Cells, Development, Biodiversity and Conservation: WBI13/01 Unit 3: Practical Skills in Biology I: WBI14/01 Unit 4: Energy, Environment, Microbiology and Immunity: WBI15/01 Unit 5: Respiration, Internal Environment, Coordination and Gene Technology: WBI16/01 Unit 6: Practical Skills in Biology II:
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
Coordination, Response and Gene Technology
65 marks this session
Practise in RevuiPlant Structure and Function, Biodiversity and Conservation
65 marks this session
Practise in RevuiMembranes, Proteins, DNA and Gene Expression
60 marks this session
Practise in RevuiSelf-diagnostic checklist
Key actions before you sit this paper — copy and tick off as you revise
- 1Message
A comprehensive analysis of the January 2023 Pearson Edexcel International Advanced Level Biology examination series (Units 1 to 6).
- 2Message
The papers evaluated student competency across core biochemical, cellular, metabolic, and physiological concepts alongside advanced practical and investigative procedures.
Teacher briefing pack
One-page session summary for tutors and classroom review
2023 2023
Biology
A comprehensive analysis of the January 2023 Pearson Edexcel International Advanced Level Biology examination series (Units 1 to 6). The papers evaluated student competency across core biochemical, cellular, metabolic, and physiological concepts alongside advanced practical and i
A comprehensive analysis of the January 2023 Pearson Edexcel International Advanced Level Biology examination series (Units 1 to 6).
The papers evaluated student competency across core biochemical, cellular, metabolic, and physiological concepts alongside advanced practical and investigative procedures.
- Total marks
- 440
- Duration
- 550 min
- Session difficulty
- 3.5 / 5
Session analysis
A comprehensive analysis of the January 2023 Pearson Edexcel International Advanced Level Biology examination series (Units 1 to 6). The papers evaluated student competency across core biochemical, cellular, metabolic, and physiological concepts alongside advanced practical and investigative procedures.
Updated Jun 12, 2026
Paper breakdown
WBI11/01 Unit 1: Molecules, Diet, Transport and Health: WBI12/01 Unit 2: Cells, Development, Biodiversity and Conservation: WBI13/01 Unit 3: Practical Skills in Biology I: WBI14/01 Unit 4: Energy, Environment, Microbiology and Immunity: WBI15/01 Unit 5: Respiration, Internal Environment, Coordination and Gene Technology: WBI16/01 Unit 6: Practical Skills in Biology II:
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.
80% 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
(Structured)
312·132·71%
Long Answer & Level of Response
(*)
100·16·23%
Multiple Choice
(MCQ)
28·28·6%
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.
Unit 1 (WBI11)
0.50 m/minUnit 2 (WBI12)
0.89 m/minUnit 3 (WBI13)
0.63 m/minUnit 4 (WBI14)
0.86 m/minUnit 5 (WBI15)
0.86 m/minUnit 6 (WBI16)
0.63 m/minTotal marks
380
Total time
500 min
Avg pace
0.76
Next-year prediction
Topics worth watching next year, with the reason shown directly below each bar.
Cardiovascular Disease and Atherosclerosis formation
90%90%
Natural Selection and Speciation pathways
85%85%
Analysis is paraphrased for study purposes. Always verify against the official examiner report and mark scheme.