A-LEVEL BIOLOGY • OCR
LOOKS EASY.
TOTALLY TRICKY.
The Questions That Catch Everyone Out
Master the sneaky exam questions before they master you
ATP
Eukaryotic Cell • Not to scale
Detailed answers • Exam tips • Common mistakes • Memory tricks
,LOOKS EASY. TOTALLY TRICKY. | OCR A-Level Biology ocr-biology-tricks.com
Table of Contents
Introduction: Why These Questions Catch You Out 3
Chapter 1: Cell Biology — The Deceptive Details 4–5
Chapter 2: Exchange & Transport — Where Students Slip Up 6–7
Chapter 3: Enzymes — The Tricky Mechanism Questions 8–9
Chapter 4: DNA & Protein Synthesis — Sneaky Sequence Questions 10–11
Chapter 5: Respiration & Photosynthesis — The Calculation Traps 12–14
Chapter 6: Genetics — The Questions That Look Simple 15–16
Chapter 7: Ecology — Data Interpretation Tricks 17–18
Chapter 8: Biodiversity & Classification 19
Chapter 9: Communication & Homeostasis 20–21
Chapter 10: Immunity — Where Marks Are Lost 22–23
Chapter 11: Musculoskeletal & Nervous System 24–25
Chapter 12: Genetic Technologies & Ethics 26–27
Top 20 Exam Day Tips 28
Mark Scheme Language — What Examiners Want 29
Quick Reference: Common Confused Pairs 30
Page 2
, LOOKS EASY. TOTALLY TRICKY. | OCR A-Level Biology ocr-biology-tricks.com
Why These Questions Catch You Out
Every year, students walk into OCR A-Level Biology exams feeling ready. They've learned the content,
revised their notes, done past papers. And then they open the paper — and lose marks on questions
they never expected to find difficult.
These are not the hard questions. They're the sneaky ones. The ones that look like two marks for
repeating a definition, but actually need you to apply a concept in a slightly different way. The ones
where you write the right biology but use the wrong word. The ones where the diagram is familiar but
the question is asking something you've never been directly taught to say.
This guide is built around those questions. Each chapter takes a core topic from the OCR specification
and unpacks the questions that seem easy but cost marks. You'll find the question, the common wrong
answer, the correct model answer, and the exact reason why it trips people up.
■ Each topic section includes:
■ The exam-style question ■ The common wrong answer
■ The model answer ■ The reason it's tricky
■ Memory tricks ■ Examiner tips
"The difference between a C and an A is not how much biology you know — it's whether
you know how to say it in the way the mark scheme expects."
Page 3
LOOKS EASY.
TOTALLY TRICKY.
The Questions That Catch Everyone Out
Master the sneaky exam questions before they master you
ATP
Eukaryotic Cell • Not to scale
Detailed answers • Exam tips • Common mistakes • Memory tricks
,LOOKS EASY. TOTALLY TRICKY. | OCR A-Level Biology ocr-biology-tricks.com
Table of Contents
Introduction: Why These Questions Catch You Out 3
Chapter 1: Cell Biology — The Deceptive Details 4–5
Chapter 2: Exchange & Transport — Where Students Slip Up 6–7
Chapter 3: Enzymes — The Tricky Mechanism Questions 8–9
Chapter 4: DNA & Protein Synthesis — Sneaky Sequence Questions 10–11
Chapter 5: Respiration & Photosynthesis — The Calculation Traps 12–14
Chapter 6: Genetics — The Questions That Look Simple 15–16
Chapter 7: Ecology — Data Interpretation Tricks 17–18
Chapter 8: Biodiversity & Classification 19
Chapter 9: Communication & Homeostasis 20–21
Chapter 10: Immunity — Where Marks Are Lost 22–23
Chapter 11: Musculoskeletal & Nervous System 24–25
Chapter 12: Genetic Technologies & Ethics 26–27
Top 20 Exam Day Tips 28
Mark Scheme Language — What Examiners Want 29
Quick Reference: Common Confused Pairs 30
Page 2
, LOOKS EASY. TOTALLY TRICKY. | OCR A-Level Biology ocr-biology-tricks.com
Why These Questions Catch You Out
Every year, students walk into OCR A-Level Biology exams feeling ready. They've learned the content,
revised their notes, done past papers. And then they open the paper — and lose marks on questions
they never expected to find difficult.
These are not the hard questions. They're the sneaky ones. The ones that look like two marks for
repeating a definition, but actually need you to apply a concept in a slightly different way. The ones
where you write the right biology but use the wrong word. The ones where the diagram is familiar but
the question is asking something you've never been directly taught to say.
This guide is built around those questions. Each chapter takes a core topic from the OCR specification
and unpacks the questions that seem easy but cost marks. You'll find the question, the common wrong
answer, the correct model answer, and the exact reason why it trips people up.
■ Each topic section includes:
■ The exam-style question ■ The common wrong answer
■ The model answer ■ The reason it's tricky
■ Memory tricks ■ Examiner tips
"The difference between a C and an A is not how much biology you know — it's whether
you know how to say it in the way the mark scheme expects."
Page 3
