BIOLOGY · IB Diploma Programme
BIOLOGY/12
A
Biology · 2024 · Variant 2
Relative difficulty
Analysis source: International Baccalaureate Organization
Analysis aligned to the official syllabus and assessment design.
3.5 / 5
115
180 min
Integration of body systems & Option D Human Physiology
Cohort performance
Session statistics from official examination reports
Total marks
115
Duration
180 min
Session difficulty
3.5 / 5
Key examiner messages
Top priorities from the principal examiner before you revise
The May 2024 examination papers present a balanced yet rigorous assessment of the Standard Level biology curriculum.
With a moderate-to-challenging difficulty profile, success on these papers required not just rote memorization, but a deep capacity for graphical interpretation, quantitative processing, and the precise execution of core biological diagrams.
Compare difficulty across recent years. Compare topic weight by year to spot recurring and returning areas.
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.
Theoretical Knowledge
Weight: 6100%Analysis & I
Weight: 467%Diagrams &
Weight: 350%Drawing
Weight: 233%Calculations & Application
Weight: 117%
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
IB subject report — grade distributions, IA weighting, and HL/SL distinctions
Level 7
Excellent — top band for competitive university offers
Level 6
Very good — strong HL performance
Level 5
Good — solid pass at higher level
Level 4
Satisfactory — minimum for many university credits
Level 3
Mediocre
Level 2
Poor
Level 1
Very poor
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.
Match the expected response style for “Outline” questions.
Match the expected response style for “State” questions.
Name or point to the specific feature asked for — avoid extra explanation.
Show formula, substitution, and unit; method marks need visible working.
Present multiple perspectives with evidence; balance breadth and depth.
Time traps
Sections where candidates spent disproportionate time relative to marks
Min per mark: 1.8
Min per mark: 1.7
Min per mark: 1.6
Min per mark: 1.5
Syllabus traceability
Topics linked to questions and mark weighting in this session
Integration of body systems (Interaction and interdependence)
30 marks this session
Populations and communities (Interaction and interdependence)
11 marks this session
Cell and nuclear division (Continuity and change)
9 marks this session
Cell structure (Unity and diversity)
8 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
Integration of body systems (Interaction and interdependance)
Cell and nuclear division (Continuity and change)
Cell respiration
Transport
Inheritance
Transport (Form and function)
Membranes and membrane transport (Form and function)
Neural signalling
Difficulty trend
How session difficulty has shifted across recent years
Paper comparison
Marks and duration breakdown across papers in this session
Paper 1 (Multiple Choice):
Paper 2 (Short & Extended Response):
Paper 3 (Data & Options):
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
Integration of body systems (Interaction and interdependence)
30 marks this session
Practise in RevuiPopulations and communities (Interaction and interdependence)
11 marks this session
Practise in RevuiCell and nuclear division (Continuity and change)
9 marks this session
Practise in RevuiCell structure (Unity and diversity)
8 marks this session
Practise in RevuiSelf-diagnostic checklist
Key actions before you sit this paper — copy and tick off as you revise
- 1Message
The May 2024 examination papers present a balanced yet rigorous assessment of the Standard Level biology curriculum.
- 2Message
With a moderate-to-challenging difficulty profile, success on these papers required not just rote memorization, but a deep capacity for graphical interpretation, quantitative processing, and the precise execution of core biological diagrams.
- 3Message
Compare difficulty across recent years. Compare topic weight by year to spot recurring and returning areas.
Teacher briefing pack
One-page session summary for tutors and classroom review
2024 2024
Biology
The May 2024 examination papers present a balanced yet rigorous assessment of the Standard Level biology curriculum. With a moderate-to-challenging difficulty profile, success on these papers required not just rote memorization, but a deep capacity for graphical interpretation, q
The May 2024 examination papers present a balanced yet rigorous assessment of the Standard Level biology curriculum.
With a moderate-to-challenging difficulty profile, success on these papers required not just rote memorization, but a deep capacity for graphical interpretation, quantitative processing, and the precise execution of core biological diagrams.
Compare difficulty across recent years. Compare topic weight by year to spot recurring and returning areas.
- Total marks
- 115
- Duration
- 180 min
- Session difficulty
- 3.5 / 5
Session analysis
The May 2024 examination papers present a balanced yet rigorous assessment of the Standard Level biology curriculum. With a moderate-to-challenging difficulty profile, success on these papers required not just rote memorization, but a deep capacity for graphical interpretation, quantitative processing, and the precise execution of core biological diagrams.
Updated Jun 14, 2026
Paper breakdown
Paper 1 (Multiple Choice):
Paper 2 (Short & Extended Response):
Paper 3 (Data & Options):
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.
78% 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.
Data-Based and Short Answer
51·18·44%
Extended Response
(Essay Options)
34·6·30%
Multiple Choice
30·30·26%
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 (MCQ)
0.68 m/minPaper 2 Section A
0.64 m/minPaper 2 Section B (…
0.60 m/minPaper 3 Section A
0.57 m/minTotal marks
85
Total time
135 min
Avg pace
0.63
Next-year prediction
Topics worth watching next year, with the reason shown directly below each bar.
Homeostasis
88%88%
Photosynthesis
82%82%
Enzymes and metabolism
75%75%
May 2024 IB Biology SL Exam Analysis
The May 2024 examination papers present a balanced yet rigorous assessment of the Standard Level biology curriculum. With a moderate-to-challenging difficulty profile, success on these papers required not just rote memorization, but a deep capacity for graphical interpretation, quantitative processing, and the precise execution of core biological diagrams.
Exam tips
Paper format
- Duration
- 1h 20min
- Total marks
- 40
Analysis is paraphrased for study purposes. Always verify against the official examiner report and mark scheme.