CIE A Level Biology Paper 3 Practical Guide (9700): Advanced Practical Skills
Q: What is CIE A Level Biology Paper 3?
A: Paper 3 is the Cambridge International AS Level Biology laboratory practical paper. It is a 2-hour, 40-mark paper assessing AO3 practical skills in a lab context.
TL;DR
CIE Biology 9700 Paper 3 is Advanced Practical Skills. It lasts 2 hours, carries 40 marks, and contributes 23% of AS Level or 11.5% of A Level. Expect laboratory investigations, microscopy, biological drawing, tables, graphs, calculations, conclusions, and evaluation.
Concrete example: how marks are won
If an enzyme result increases from 12 mm to 20 mm, do not write "it went up". Write that the result increased by 8 mm, then link the change to the condition tested. The data does the explaining for you.
1 Paper 3 at a glance
| Feature | CIE Biology 9700 Paper 3 |
| Paper name | Advanced Practical Skills |
| Duration | 2 hours |
| Marks | 40 |
| AS weighting | 23% |
| A Level weighting | 11.5% |
| Format | Timetabled laboratory practical |
Paper 3 sits in the AS part of the Cambridge International Biology route. It assesses practical skills even when the biological context is unfamiliar.
2 What Paper 3 usually demands
Investigation work
You may need to carry out a biological investigation, collect quantitative or qualitative data, and process the data into a table or graph. Common contexts include enzymes, transport, osmosis, membranes, pigments, or ecology-style sampling.
High-value habits:
- State units in table headings
- Keep decimal places consistent within a column
- Record enough repeats to support reliability
- Process data before drawing conclusions
- Quote data when making a conclusion
Microscopy and drawing
Cambridge Biology 9700 Paper 3 explicitly includes practical skills involving a light microscope. Prepare for:
- Slide observation
- Biological drawings
- Magnification calculations
- Comparison of structures
- Drawing labels and annotations
The drawing must show what is observed, not what a textbook diagram says should be there.
Evaluation
Evaluation marks require a specific error and a specific improvement. Avoid vague phrases such as "human error" or "do more repeats" unless you state what is repeated and why.
3 Preparation plan
- Practise microscope setup and biological drawing every week.
- Run one investigation data table and one graph every week.
- Build a list of accepted evaluation phrases from mark schemes.
- Practise conclusions that quote numerical data.
- Time yourself through complete 2-hour Paper 3-style sessions.
4 Related resources
References
- Cambridge International, AS & A Level Biology 9700 syllabus for 2025-2027.
- Cambridge International, AS & A Level Biology 9700 syllabus overview.
