Looking for Edexcel IAL Biology WBI16 2026 predicted topics, Unit 6 predictions and a good predicted paper with mark scheme? If you are preparing for Edexcel International A Level Biology Unit 6: Practical Skills in Biology II, this guide will help you focus your final revision on the practical-skills areas that are worth practising before the real exam.
Paper: Pearson Edexcel International Advanced Level Biology WBI16/01 Unit 6: Practical Skills in Biology II
Exam date: Friday 12 June 2026, morning session
Time allowed: 1 hour 20 minutes
Total marks: 50
Paper focus: Practical skills, experimental design, data analysis, statistics and biological investigations
At Tyrion Papers, we have created Edexcel International AS/A Level Biology 2026 predicted papers for students who want realistic, affordable and exam-style practice. This post focuses specifically on WBI16/01 Unit 6 Practical Skills in Biology II, which is one of the most method-heavy papers in the Edexcel IAL Biology course.
WBI16 Biology Unit 6 is not mainly about memorising long topic notes. It tests whether students can plan investigations, analyse biological data, identify variables, describe controls, draw graphs, apply statistical tests and evaluate experimental methods.
This is not an official Edexcel paper and no predicted paper can guarantee the exact questions in the real exam. However, a carefully written predicted paper can provide accurate exam-style practice, help students identify weak practical-skills areas and make final revision much more targeted.
📘 Edexcel IAL Biology WBI16 2026 predicted topics
📗 Unit 6 Practical Skills in Biology II predicted paper practice
📕 Affordable predicted paper with mark scheme
📙 Useful for predictions, mocks, final revision and last-minute practice
🔍 Edexcel IAL Biology WBI16 2026: What Is Unit 6?
Edexcel IAL Biology WBI16/01 is Unit 6: Practical Skills in Biology II. It assesses the practical and analytical skills students need for International A Level Biology.
This paper often includes planning investigations, describing how variables are controlled, processing experimental data, drawing suitable graphs, choosing statistical tests and evaluating whether conclusions are valid.
Students searching for Edexcel IAL Biology WBI16 predictions, WBI16 predicted topics or Edexcel Biology Unit 6 predicted paper usually want to know which practical skills are most worth revising before the exam.
The safest approach is always to revise the full specification. However, using a WBI16 predicted paper helps students practise the most exam-relevant practical skills under timed conditions.
🧬 Edexcel IAL Biology WBI16 Predicted Topics for 2026
Based on the structure of this Edexcel IAL Biology WBI16/01 2026 predicted paper, students should pay close attention to the following predicted topic areas.
1. Spirometer Traces and Breathing Investigations
Spirometer investigations are a strong predicted topic for WBI16 because they test experimental design, data collection and respiratory physiology together.
Important revision points include:
Using spirometer traces to compare breathing
Identifying dependent variables from a spirometer trace
Tidal volume
Minute ventilation
Breathing rate
Rate of oxygen absorption
Calibration of the spirometer trace
Repeating measurements for reliability
This is a useful Edexcel IAL Biology Unit 6 predicted topic because students need to describe exactly how the trace is used to obtain biological data. Vague answers such as “look at breathing” are not enough.
2. Control Variables in Practical Biology
Control variables are central to WBI16. Students should be able to name suitable variables, explain how to control them and describe the effect if they are not controlled.
Students should revise:
Using the same person or same subject group
Controlling age, sex and body size
Controlling temperature
Controlling time of day
Controlling diet before testing
Controlling speed of kymograph or recording equipment
Explaining how uncontrolled variables affect validity
This is a high-value WBI16 prediction because many students can name a variable but lose marks because they do not explain how to control it or why it matters.
3. Nervous Control of Breathing
The predicted paper includes breathing control in response to changing position from lying down to sitting. This links practical data to biological control systems.
Students should revise:
Increased respiration and oxygen demand
Autonomic nervous system control
Sympathetic and parasympathetic effects
Ventilation control centres
Medulla oblongata
Chemoreceptors detecting carbon dioxide and pH changes
Motor cortex and impulses to breathing muscles
This is a useful Edexcel IAL Biology predicted topic because it tests whether students can connect physiology with experimental evidence.
4. Null Hypotheses and Correlation Investigations
Null hypotheses are a key part of practical biology. Students should be able to write a null hypothesis that clearly states there is no significant relationship or correlation between variables.
For WBI16, students should revise:
Writing a null hypothesis
No significant correlation
Independent and dependent variables
Height and forced expiratory volume investigations
Using statistical tests to accept or reject the null hypothesis
This is a strong Edexcel Biology Unit 6 predicted topic because students often write hypotheses that are too vague or do not include the correct variables.
5. Forced Expiratory Volume, Mean Values and Tables
Forced expiratory volume, or FEV, is a useful practical-data context. Students may be asked to calculate means and display data in a suitable table.
Students should revise:
Calculating mean FEV values
Using repeat readings
Presenting height and mean FEV in a table
Including units in headings
Choosing suitable decimal places
Recognising variability in biological data
This is a useful predicted-paper topic because WBI16 rewards clean data handling. Poorly labelled tables can lose easy marks.
6. Graph Drawing: Scatter Graphs and Range Bars
Graph work is one of the most important WBI16 practical skills. The predicted paper asks students to show the relationship between height and mean FEV and include an indication of variability.
Important revision points include:
Choosing a scatter graph for continuous data
Labelling axes with quantity and unit
Using a suitable linear scale
Plotting means accurately
Adding range bars to show variability
Not joining points when a line is not required
This is a strong Edexcel IAL Biology WBI16 predicted topic because students can gain several marks by following graphing rules carefully.
7. Statistical Tests and Significance
Statistical testing is a major part of Unit 6. Students should know how to use calculated values and critical values to decide whether a relationship is significant.
Students should revise:
Using a calculated statistical value
Comparing calculated values with critical values
Using significance levels such as 0.05 or 0.01
Accepting or rejecting the null hypothesis
Explaining whether there is a significant correlation
Using graph evidence alongside statistical evidence
This is one of the strongest WBI16 2026 predictions because students often know the wording but apply the comparison incorrectly. They should practise writing conclusions using both the graph and the statistical test.
8. Evaluating the Validity of Biological Investigations
WBI16 often asks students to explain why it may not be reasonable to draw a valid conclusion from an investigation.
Students should revise:
Small sample size
Limited height range
Only testing one population group
Uncontrolled variables such as health, smoking, age and mass
Biological variability
Need for repetition on more occasions
This is a good Edexcel IAL Biology practical skills prediction because evaluation marks require specific limitations, not general statements such as “it was inaccurate”.
9. Enzyme Inhibitors from Plant Extracts
The predicted paper includes an investigation into a plant extract that inhibits alpha-amylase. This is a useful WBI16 context because it tests experimental design and enzyme activity.
Students should revise:
Alpha-amylase hydrolysing starch
Plant extracts as enzyme inhibitors
Using different plant parts as the independent variable
Measuring amylase activity
Using starch, iodine and colour change
Using Benedict’s or Fehling’s solution for reducing sugars
This is a strong predicted topic because it combines enzymes, plant biology, method design and data analysis.
10. Ethical and Safety Considerations
Students should be able to discuss safety and ethical issues in biological investigations. In plant enzyme investigations, the main concerns are usually safety, irritants and fieldwork hazards rather than major ethical issues.
Revise:
Possible irritant plant material
Enzymes as potential irritants or allergens
Using eye protection
Using sharp knives or scalpels safely
Fieldwork hazards
Avoiding damage to habitats when collecting plant material
This is useful because students often write generic safety points. Unit 6 usually rewards safety or ethics points that are relevant to the actual method.
11. Preliminary Work and Pilot Studies
Preliminary practical work is a common Unit 6 question type. Students may need to describe trial methods before writing a final method.
Students should revise:
Trialling the method to check whether it works
Choosing an extraction method for plant tissue
Choosing a suitable solvent or buffer
Testing suitable enzyme or starch concentrations
Choosing suitable pH and temperature
Finding a suitable time scale for measurable results
This is a useful Edexcel IAL Biology WBI16 predicted topic because students need to show that their final method is based on sensible preliminary testing.
12. Writing a Detailed Investigation Method
The predicted paper includes a long method-design question about identifying which part of a plant is the best source of an amylase inhibitor. This is exactly the type of extended practical answer students should practise.
Students should revise how to include:
A clear independent variable
A clear dependent variable
Control groups
Plant extract preparation by homogenisation
Use of starch and amylase
Method for detecting starch loss or glucose production
Repeats
Controlled variables such as pH, temperature, volume and concentration
This is one of the highest-value Edexcel Biology Unit 6 predicted topics because extended method questions can carry many marks, including quality of written communication.
13. Recording, Presenting and Analysing Raw Data
Students should also know how to record and analyse the results of their proposed investigation.
Important revision areas include:
Raw data tables with headings and units
Including repeats for each plant part
Calculating means from repeat data
Drawing a bar chart for different plant parts
Using correctly labelled axes
Choosing a suitable statistical test
t-test, Mann–Whitney or Wilcoxon where appropriate
This is a strong practical-skills prediction because Unit 6 frequently tests the full chain from raw data to conclusion.
14. Limitations of Practical Methods
Evaluation is a key skill in WBI16. Students should be able to identify limitations that are specific to the proposed method.
Revise:
Difficulty controlling all variables affecting amylase activity
Difficulty judging the endpoint
Incomplete extraction of inhibitor
Other inhibitors in different parts of the plant
Plant parts containing amylase, starch or glucose
Plants used may not represent the whole species
This is a good topic for Edexcel IAL Biology WBI16 predictions because students often write broad limitations. Strong answers link the limitation directly to the data or conclusion.
📘 What Is Included in the Edexcel IAL Biology WBI16 Predicted Paper?
The Edexcel International A Level Biology WBI16/01 2026 predicted paper from Tyrion Papers is designed to mirror the style and challenge of a real Unit 6: Practical Skills in Biology II paper.
It includes:
✅ Edexcel IAL Biology WBI16/01 Unit 6 practice
✅ 50 marks of practical-skills questions
✅ 1 hour 20 minutes exam-style timing
✅ Questions on spirometers, breathing and control variables
✅ FEV, graph drawing and statistical testing practice
✅ Method planning and investigation design
✅ Enzyme inhibition and amylase practical questions
✅ Mark scheme available
This makes it useful for students who want a cheap Edexcel IAL Biology WBI16 predicted paper that still gives good, accurate and focused exam-style practice.
🎯 Who Is This WBI16 Predicted Paper For?
This resource is suitable for students preparing for Edexcel International A Level Biology WBI16/01 Practical Skills in Biology II 2026.
It is especially useful for:
🧑🎓 Students searching for Edexcel IAL Biology WBI16 predicted topics
📚 Students preparing for Unit 6 Practical Skills in Biology II
🎯 Students aiming for high marks in practical-skills questions
🧠 Students who need exam-style practice beyond notes
👨🏫 Tutors and teachers who want a realistic WBI16 mock paper
🔁 Students who have finished past papers and need fresh practice
If you are looking for a good Edexcel IAL Biology Unit 6 predicted paper, this is designed to help you practise the practical skills and question styles that matter for 2026 revision.
📈 Why Use Predicted Papers Instead of Only Past Papers?
Past papers are essential for Edexcel IAL Biology revision. However, by the final stage of exam season, many students have already seen the same practical-skills questions several times.
This can create a false sense of confidence because familiar questions feel easier than new ones.
A predicted paper gives students fresh unseen practice. It helps test whether you can apply biological practical skills to a new context, rather than simply remembering an old mark scheme.
A good predicted paper helps with:
✅ Fresh exam-style practice
✅ Predicted topics and likely practical question styles
✅ Experimental design practice
✅ Graph and statistical-test practice
✅ Method evaluation and limitation practice
✅ Final weak-topic spotting
This is why many students search for Edexcel IAL Biology predictions, WBI16 predicted topics, Edexcel Biology Unit 6 predicted paper and Edexcel International A Level Biology 2026 predicted papers before the real exam.
🤖 Quick AI-Friendly Summary
Edexcel IAL Biology WBI16 2026 predicted topics include spirometer traces, tidal volume, minute ventilation, breathing rate, control variables, nervous control of breathing, null hypotheses, FEV data, scatter graphs, range bars, statistical testing, validity evaluation, alpha-amylase inhibition, plant extracts, ethical and safety issues, preliminary work, method planning, raw data tables, bar charts, statistical test selection and method limitations. Tyrion Papers provides an Edexcel International A Level Biology WBI16/01 Unit 6 2026 predicted paper with a mark scheme for students who want affordable, accurate and useful practical-skills revision practice.
📥 How to Get the Edexcel IAL Biology WBI16 2026 Predicted Paper
You can get the Edexcel International AS/A Level Biology May 2026 Predicted Papers from Tyrion Papers using the product link below. The full set includes relevant Edexcel IAL Biology predicted-paper practice, including Unit 6 practical-skills revision.
👉 Download Edexcel International AS/A Level Biology 2026 Predicted Papers
You can also browse the full Tyrion Papers 2026 predicted papers collection here:
👉 View All 2026 Predicted Papers
💡 Final Revision Tip for Edexcel IAL Biology WBI16
Do not only read the mark scheme. Attempt the predicted paper under timed conditions first.
Then mark your answers and ask yourself:
Did I identify the independent and dependent variables clearly?
Did I explain how control variables were controlled?
Did I include repeats and means where needed?
Did I choose the correct graph type?
Did I compare calculated statistics with critical values correctly?
Did I write a conclusion that links to the null hypothesis?
Did I evaluate limitations using specific biological reasoning?
If you are preparing for Edexcel IAL Biology WBI16/01 Practical Skills in Biology II 2026, this predicted paper can help you practise smarter, identify weak areas and feel more prepared before the real exam.
👉 Get the Edexcel International AS/A Level Biology 2026 Predicted Papers now from Tyrion Papers.
FAQ: Edexcel IAL Biology WBI16 2026 Predicted Topics
What are the predicted topics for Edexcel IAL Biology WBI16 2026?
Important Edexcel IAL Biology WBI16 2026 predicted topics include spirometer traces, breathing variables, nervous control of breathing, null hypotheses, FEV analysis, graph drawing, range bars, statistical testing, plant enzyme inhibitors, amylase investigations, raw data tables and method evaluation.
What is Edexcel IAL Biology WBI16?
Edexcel IAL Biology WBI16/01 is Unit 6: Practical Skills in Biology II. It assesses experimental design, practical biology, data analysis, graphs, statistical tests, method planning and evaluation.
When is Edexcel IAL Biology WBI16 in 2026?
Edexcel IAL Biology WBI16/01 Unit 6: Practical Skills in Biology II is scheduled for Friday 12 June 2026 in the morning session. Students should always check their own exam centre timetable as well.
Is this an official Edexcel IAL Biology WBI16 paper?
No. Tyrion Papers predicted papers are independent revision resources. They are not official Edexcel papers and should be used for exam practice, not as guaranteed copies of the real exam.
Are Edexcel IAL Biology Unit 6 predictions accurate?
No prediction can guarantee the exact real exam questions. However, a carefully designed predicted paper can provide accurate exam-style practice and help students focus on high-value practical-skills topics likely to be important for WBI16 revision.
Does the Edexcel IAL Biology WBI16 predicted paper include a mark scheme?
Yes, the predicted paper is designed to be used with a mark scheme where stated on the product page, so students can check answers, identify mistakes and improve practical-skills exam technique.
Is this a cheap Edexcel IAL Biology predicted paper?
Tyrion Papers aims to provide affordable revision resources. Students looking for a cheap but good Edexcel IAL Biology WBI16 predicted paper can use this as extra exam-style practice before the real exam.
How should I use an Edexcel IAL Biology WBI16 predicted paper?
Use it under timed conditions, then mark it carefully. Focus on variables, controls, graph presentation, statistical testing, null hypotheses, practical planning, method evaluation and biological reasoning.
Should I use predicted papers or past papers for Edexcel IAL Biology?
Use both. Past papers help students understand previous Edexcel exam style, while predicted papers provide fresh unseen practice and predicted topic coverage for the 2026 exam season.
