Question 1
The Venn diagram compares the components of DNA and RNA. Which component belongs in region Y?
Biology practice questions by topic
Original questions for every topic in Paper 1A, 1B and 2 style, with worked explanations.
| Paper 1A | Multiple choice, about 2 minutes a question in our timed sets |
|---|---|
| Paper 1B | Data-based questions: tables, graphs and trends |
| Paper 2 | Data-based and short-answer questions |
| Levels | Every question is tagged SL or HL |
Try 4 questions
Question 2
Which process takes place in the organelle labelled X in the diagram of an animal cell?
Question 3
| Category | Antibody |
|---|---|
| 0 | 0 |
| 7 | 10 |
| 14 | 40 |
| 21 | 15 |
| 28 | 5 |
| 35 | 380 |
| 42 | 300 |
| 49 | 200 |
A person was exposed to the same antigen on day 0 and again on day 28. The graph shows the antibody concentration in the blood. Why is the second response faster and larger?
Question 4
| Solution injected into oocytes | Rabbit globin detected |
|---|---|
| Rabbit globin mRNA | yes |
| Buffer only | no |
| Rabbit globin mRNA treated with an RNA-digesting enzyme | no |
Frog egg cells (oocytes) were injected with different solutions and then tested for rabbit globin, a protein that frog cells do not normally make. Which conclusion do the results best support?
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Questions people ask
Are older past papers useful?
The current course was first assessed in 2025 in four themes, A to D. Check older questions against the current topics.