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A-Level Biology Past Papers & Drilling (Paper 1): Cells, Enzymes, Genetics
TUTORZONE ORIGINAL DRILLING MOCK · CAMBRIDGE A-LEVEL BIOLOGY (9700) PAPER 1
Written to the Cambridge 9700 syllabus: Paper 1 Multiple Choice, 40 marks, 1 h 15 min, 15.5% of A Level (40 four-choice items, AS content); plus Paper 2 AS structured, Paper 4 A Level structured (100) and Paper 5 planning. This is a Paper 1 drilling mock: 6 questions demonstrating the 40-mark core concepts, with answers and techniques.
What is in A-Level Biology (9700) Paper 1?
Direct answer: Paper 1 Multiple Choice, 40 marks, 1 h 15 min, 15.5% of A Level (40 four-choice items, AS content).
Assessment at a glance (2027)
| Component | Content | Weighting | Duration |
|---|---|---|---|
| Paper 1 (Multiple Choice) | 40 four-choice items, 40 marks | 15.5% A-Level | 1 h 15 min |
| Paper 4 (A Level Structured Questions) | Structured questions, 100 marks | A Level 38.5% | 2 hours |
A-Level Biology Paper 1 drilling technique: 40 questions in 1 h 15 min is about 2 min each. Core: eukaryotes have a nucleus and organelles; enzymes lower activation energy via the active site; competitive inhibitors compete, non-competitive change shape; DNA is semi-conservative (one old, one new).
How this paper was built
This is a TutorZone original drilling mock: the questions follow the Cambridge 9700 structure (Paper 1, 40 marks, 15.5%) and the answers are our own, not Cambridge past papers or marking references.
Pacing
| Section | Marks | Suggested time | What to do first |
|---|---|---|---|
| Paper 1 (Multiple Choice) | 15.5% A-Level | about 2 min per question | all AS content |
| Paper 4 (A Level Structured Questions) | A Level 38.5% | about 12 min per question | AS + A2 content |
How do enzymes lower activation energy?
Direct answer: the active site binds the substrate to form an enzyme-substrate complex, so the reaction happens more easily and the activation energy falls.
Paper 1: concept drilling (6 demonstrated)
Keep eukaryotic/prokaryotic and the two inhibition types apart.
Question 1 (7 marks)
State three differences between eukaryotic and prokaryotic cells.
Question 2 (7 marks)
Explain how an enzyme lowers activation energy.
Question 3 (7 marks)
Explain the difference between competitive and non-competitive inhibition.
Question 4 (6 marks)
Explain why DNA replication is semi-conservative.
Question 5 (7 marks)
Explain how smoking increases the risk of lung cancer.
Question 6 (6 marks)
Explain the difference between active and passive immunity.
Competitive vs non-competitive inhibition?
Direct answer: a competitive inhibitor competes for the active site; a non-competitive one binds elsewhere and changes its shape.
Paper 1 answers
Question 1
(1) A eukaryotic cell has a membrane-bound nucleus (3). (2) It has membrane-bound organelles (mitochondria) (2). (3) Larger ribosomes (80S vs 70S) (2).
Question 2
The enzyme binds the substrate at its active site to form an enzyme-substrate complex (4), so the reaction happens more easily and the activation energy falls (3).
Question 3
A competitive inhibitor competes with the substrate for the active site (3.5); a non-competitive inhibitor binds elsewhere and changes the active site shape (3.5).
Question 4
The double helix unwinds and each strand acts as a template (3), so each new DNA has one old and one new strand (3).
Question 5
Carcinogens in smoke cause DNA mutations (4), and accumulated mutations make cells divide uncontrollably (3).
Question 6
Active immunity produces its own antibodies with memory cells, long-lasting (3); passive immunity receives antibodies directly, no memory, short-lived (3).
Which topics does this paper drill?
Direct answer: eukaryotic vs prokaryotic cells, enzymes and activation energy, enzyme inhibition, semi-conservative DNA replication, carcinogens and immunity.
Where these marks are usually lost
| Mistake | What it looks like | What it costs | Instead |
|---|---|---|---|
| Prokaryote as eukaryote | Prokaryotes have a nucleus | Prokaryotes have no nuclear envelope | no envelope |
| Two inhibition types mixed | Non-competitive competes | Non-competitive changes the active site shape | compete vs reshape |
| Semi-conservative as conservative | Two new strands | One old, one new | one old, one new |
How to use this paper
First drill: the full 1 h 15 min at the 40-question pace (this mock demonstrates 6 core items).
Mark it: check eukaryotic/prokaryotic and the inhibition types.
Second drill: redo three to seven days later, aiming to finish inside 1 hour.
What should I do after drilling this paper?
Direct answer: log eukaryotic/prokaryotic or inhibition-type errors; redo in three to seven days; and drill Paper 4 structured questions.
FAQ
Is this a Cambridge past paper?
No. The questions and answers are TutorZone originals, not Cambridge past papers or marking references.
What is in A-Level Biology 9700 Paper 1?
Multiple choice, 40 marks, 1 h 15 min, 40 four-choice items covering AS content.
Competitive vs non-competitive inhibition?
Competitive inhibitors compete for the active site; non-competitive ones bind elsewhere and change its shape.
Official references
| Resource | What to check |
|---|---|
| Cambridge A-Level Biology 9700 page | Confirm the Paper 1-5 marks and times |
| https://www.tutorzone.com.hk/en-alevel-biology-9700-paper-2-mock-2027/ | A-Level Biology Paper 2 drilling mock |
Related: practice area · A-Level Biology Paper 2 drilling mock
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