CCEA GCSE · Analysis & Prediction

2024 CCEA GCSE Biology 1010 Past Paper: Analysis & Answers

The 2024 CCEA GCSE Biology suite comprises Unit 1 (GBL12, 75 marks), Unit 2 (GBL22, 90 marks), Unit 3 Booklet A (GBL33, 30 marks), and Unit 3 Booklet B (GBL34, 70 marks), totaling 265 marks across 345 minutes. Across all components, the papers reward precise biochemical definitions, rigorous multi-step numerical calculations (percentages, rates, magnifications), systematic graph analysis, and extended 6-mark QWC responses.

Updated: Aug 31, 2026

Analysis Sample paper

Difficulty 3.1/5

Total marks

265

Duration

345 mins

Most tested

Practical Experimental Design & Data Interpretation

Paper breakdown

Unit 1: Higher Tier (GBL12): 75 marks · 75 minsUnit 2: Higher Tier (GBL22): 90 marks · 90 minsUnit 3: Practical Skills Booklet A (GBL33): 30 marks · 120 minsUnit 3: Practical Skills Booklet B (GBL34): 70 marks · 60 mins

Top chapters

Carrying out an experiment · 35 marksAnalysing experimental data · 35 marksHealth, disease, defence mechanisms and treatments · 29 marksOsmosis and plant transport · 26 marksEcological relationships and energy flow · 25 marks

Executive Examination Overview

The 2024 CCEA GCSE Biology examination suite is a rigorous and well-balanced assessment comprising four distinct components: Unit 1 (GBL12), Unit 2 (GBL22), Unit 3 Practical Booklet A (GBL33), and Unit 3 Practical Booklet B (GBL34). Together, these components span a total of 265 marks over 5 hours and 45 minutes of assessment time.

Where the Marks Are Distributed

The highest mark concentrations appear in core physiological mechanisms and experimental methodology:

Health, Disease & Treatments: Strongly emphasized in Unit 2 with clinical trial methodologies, communicable transmission mechanisms, monoclonal/immunotherapy mechanisms, and antibiotic resistance pathways.
Ecological Relationships & Field Ecology: Evaluated across Unit 1 and Unit 3 Booklet B through eutrophication cascades, competition dynamics, and line transect field sampling.
Genetics, DNA & Genetic Engineering: Prominently assessed in Unit 2 via 6-mark recombinant DNA cloning steps, sex-linked pedigrees, and genetic counseling.
Practical Skills & Analysis: Heavily weighted in Unit 3 (Booklets A & B) via calorimetry calculations, microscopic magnification formulas, percentage change computations, and starch/photosynthesis investigations.

Common Examiner Pitfalls & Lost Marks

Mark schemes from this series reveal several recurrent candidate traps:

Incomplete Biochemical Sequences: In questions detailing eutrophication, enzyme inhibition, or synapse transmission, marks were frequently forfeited when candidates skipped intermediary steps (e.g., omitting bacterial aerobic respiration causing oxygen depletion, or omitting neurotransmitter diffusion across the synaptic cleft).
Imprecise Data Quotes: When asked to 'describe the trend using data', candidates frequently quoted coordinates without noting the initial baseline, peak value, and plateau points, or omitted necessary units.
Unit Conversions & Rounding: Candidates lost method or final marks in magnification (converting \(\text{mm}\) to \(\mu\text{m}\) via \(\times 1000\)) and percentage increase calculations when failing to adhere to specified decimal place instructions.

Preparation & Strategic Guidance

To secure top bands (A*–A), candidates must practice writing structured, sequential bulleted points for 6-mark QWC questions (e.g., genetic engineering recombinant plasmid steps and eutrophication chains). Mastering practical apparatus diagrams, independent/dependent variable identification, and standard food/biochemical tests is essential for the 100 marks allocated to Unit 3.

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Charts

Marks by chapter

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Question type mix

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Short Structured & Labelling64 marks · 32 questions
Data Analysis & Trend Description52 marks · 18 questions
Mathematical Calculations31 marks · 12 questions
Mechanism Explanations & Suggest88 marks · 28 questions
Extended Response (6-Mark QWC)30 marks · 5 questions

Mark accessibility

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79%within easy or medium reach

118

easy: 92 marksmedium: 118 markshard: 55 marks

Difficulty trend

Compare difficulty across recent years.

Command word frequency

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Skill weighting

Shows the skill mix this paper tested most heavily.

Study ROI

Bigger bubbles recur more often; higher bubbles carry more marks, helping you rank revision priorities.

Practical Microscopy & Magnification Calculations

17 marks · Difficulty 2.2 · recurrence 95%

Standard Food Tests & Energy Content Calorimetry

20 marks · Difficulty 2.4 · recurrence 92%

Ecology Sampling & Eutrophication Mechanism

25 marks · Difficulty 2.7 · recurrence 90%

Genetic Engineering & Monoclonal Antibodies

22 marks · Difficulty 3.4 · recurrence 88%

Osmosis & Transpiration Rate Experiments

26 marks · Difficulty 3.1 · recurrence 91%

Time vs marks

Compare marks with suggested time allocation to plan exam pacing.

marksmins

Next-year prediction

Topics worth watching next year, with the reason shown directly below each bar.

Human Respiratory System & Gas Exchange Adaptations88%

Heavily featured in 2023 (28 marks) but underrepresented in 2024 theory papers (appearing only as brief respiration references).

Photosynthesis Limiting Factors & Light Intensity Graphs85%

Photosynthesis was tested mainly as a practical protocol in 2024 Booklet A; quantitative limiting-factor rate graphs in Unit 1 are due.

Cardiovascular Disorders & Heart Dissection Anatomy82%

Blood vessel histology and angioplasty were covered in 2024; heart chamber mechanics, valve action, and coronary bypass remain high-probability targets.

Topic-year heatmap

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Jun 2022

Jun 2023

Jun 2024

Photosynthesis and plants

Genome, chromosomes, DNA and genetics

Enzymes and digestion

Osmosis and plant transport

Health, disease, defence mechanisms and treatments

Circulatory system

Nervous system and hormones

Cells

Variation and natural selection

Nutrition and food tests

Examiner insights

Official report

Common pitfalls

Failing to state both the initial and final coordinate values when describing trends across an entire data range.
Omitting the biological reason for steps in practical procedures, such as explaining why ethanol is heated in a water bath rather than over an open flame.
Confusing the direction of water potential/concentration gradients during osmosis explanations in plant cells.
Incomplete Punnett square gamete notation in sex-linked genetic crosses (e.g., omitting the X and Y superscript notation).

Misconceptions

Believing that competitive enzyme inhibitors denature the enzyme, rather than temporarily blocking the active site.
Assuming bacteria develop resistance during treatment because they 'need' to survive, rather than pre-existing random mutations being selected for.
Confusing the function of the lens (fine focusing) with the cornea (primary refraction) in vision pathways.

Where marks are lost

Losing 1 mark in calculations for failing to round to the specified number of decimal places (e.g., 2 decimal places in rate calculations).
Failing to convert millimeter measurements to micrometers using the factor 1000 in microscope magnification questions.
In extended 6-mark QWC answers, achieving only Band B due to missing key specialist terms or lacking logical sequencing.

Estimated grade boundary

Updated: Aug 31, 2026

Source: CCEA

Grade	Mark	Percentage
A*	—	90%
A	—	80%
B	—	70%
C*	—	65%
C	—	60%
D	—	50%
E	—	40%
F	—	30%
G	—	20%

Official grade boundaries published by CCEA.

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Grade	Mark	Percentage
A*	—	90%
A	—	80%
B	—	70%
C*	—	65%
C	—	60%
D	—	50%
E	—	40%
F	—	30%
G	—	20%

Grade	Mark	Percentage
A*	—	90%
A	—	80%
B	—	70%
C*	—	65%
C	—	60%
D	—	50%
E	—	40%
F	—	30%
G	—	20%

Grade	Mark	Percentage
A*	—	90%
A	—	80%
B	—	70%
C*	—	65%
C	—	60%
D	—	50%
E	—	40%
F	—	30%
G	—	20%