How are the Eduqas Biology papers structured and marked, and how do I answer the QER question?
The Eduqas exams: the three components and their structure; the assessment objectives and their weightings; the command words; and how to answer the levels-of-response Quality of Extended Response (QER) question.
A focused answer to how Eduqas A-Level Biology is examined. Covers the three components and their structure, the assessment objectives and weightings, the command words, and how to answer the levels-of-response Quality of Extended Response (QER) question.
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What this dot point is asking
To do well you must know how the Eduqas papers are structured and marked, what the assessment objectives reward, what the command words require, and how to answer the levels-of-response QER question. This page is the exam-craft companion to the content modules.
The three components
Each component is a written paper of 2 hours, 100 marks and 33.3 percent of the A-level, and each samples the Core Concepts as well as its own content:
- Component 1 Energy for Life: ATP, photosynthesis, respiration, microbiology, ecosystems and human impact.
- Component 2 Continuity of Life: classification and biodiversity, reproduction, inheritance, evolution and gene technology.
- Component 3 Requirements for Life: an 80-mark Section A core (gas exchange, transport, nutrition, the kidney, the nervous system) and a 20-mark Section B option.
All papers use structured questions plus at least one extended QER question. A calculator is allowed.
Assessment objectives
Command words
Command words tell you exactly what the examiner wants. Common ones:
- State / Name / Give: a short fact, no explanation.
- Describe: an account of what happens, without reasons.
- Explain: give reasons or a mechanism (why or how).
- Calculate: work out a numerical answer (show working).
- Compare: give similarities and differences.
- Evaluate / Discuss: weigh points for and against and reach a supported judgement.
Matching your answer to the command word is one of the easiest ways to avoid losing marks.
The QER question
To reach the top level: plan a brief structure, cover a range of points, link them into an argument (not a list), use correct terms, and answer the exact command word.
Examples in context
Example 1. Why two answers with the same facts score differently. In a QER, an answer that links the facts into a logical sequence with correct terminology reaches the top level, while one listing the same facts without links stays lower, showing why structure matters.
Example 2. Spotting an AO2 question. A question giving an unfamiliar graph or scenario and asking you to apply a principle is testing AO2 (application); recognising this tells you to use your knowledge on the data given, not just recite it.
Try this
Q1. State the weighting of the three assessment objectives in Eduqas A-Level Biology. [3 marks]
- Cue. AO1 30 percent (knowledge), AO2 45 percent (application), AO3 25 percent (analysis and evaluation).
Q2. Explain what the command word "Evaluate" requires. [2 marks]
- Cue. Weigh the evidence or arguments for and against and reach a supported judgement or conclusion.
Q3. State what is rewarded in the top level of a QER question. [2 marks]
- Cue. A sustained, coherent, logically linked answer covering a range of relevant points and using accurate scientific terminology.
Exam-style practice questions
Practice questions written in the style of WJEC Eduqas exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
Eduqas 20209 marksDiscuss how the structures of the mammalian gas exchange and circulatory systems are adapted to supply oxygen to respiring tissues. (This is a Quality of Extended Response question.)Show worked answer →
A QER (9-mark) answer is marked by levels of response, so it needs a sustained, logically linked argument, not a list of disconnected facts.
Plan a structure that links the systems: efficient gas exchange (large alveolar surface area, thin walls, moist surface, good blood supply, ventilation maintaining the gradient), then transport (haemoglobin loading oxygen in the lungs and unloading at tissues via the dissociation curve and Bohr effect), then the heart driving the double circulation.
Use correct terminology throughout (alveoli, partial pressure, oxyhaemoglobin, cardiac cycle), make explicit links between structure and function, and write in clear, connected prose.
To reach the top level, cover a range of points across both systems, link them coherently to the supply of oxygen, and avoid contradictions or vague statements.
Markers reward a coherent, well-organised answer that links gas exchange and transport to oxygen supply, uses accurate terminology, and shows a logical line of reasoning across the whole response (the criteria for the top level).
Eduqas 20213 marksAn exam question begins with the command word 'Evaluate'. Explain what this command word requires, and how it differs from 'Describe' and 'Explain'.Show worked answer →
Describe requires an account of what something is or what happens, without giving reasons.
Explain requires reasons or a mechanism (why or how something happens).
Evaluate requires you to consider the evidence or arguments for and against, weigh them up, and reach a supported judgement or conclusion.
So Evaluate goes further than Describe and Explain: it expects a balanced consideration and a conclusion based on the points made.
Markers reward Describe as an account without reasons, Explain as giving reasons or a mechanism, and Evaluate as weighing evidence to reach a judgement.
Related dot points
- The Practical Endorsement: the specified practicals and core techniques (microscopy, the biochemical tests, enzyme and membrane investigations, dissection, sampling and respirometry); and how practical skills are assessed on paper.
A focused answer to the practical-skills requirements of Eduqas A-Level Biology. Covers the Practical Endorsement, the specified practicals and core techniques (microscopy, food tests, enzyme and membrane investigations, dissection, sampling and respirometry), and how practical skills are tested on paper.
- Mathematical skills: magnification and scale; surface-area-to-volume ratio; percentages and percentage change; standard form and units; the index of diversity; the Hardy-Weinberg equation; and rates from graphs.
A focused answer to the mathematical-skills requirements of Eduqas A-Level Biology. Covers magnification and scale, surface-area-to-volume ratio, percentages and percentage change, standard form and units, the index of diversity, the Hardy-Weinberg equation, and finding rates from graphs.
- Experimental design and statistics: variables, controls, validity and reliability; types of error and uncertainty; the chi-squared test; correlation and causation; and choosing an appropriate statistical test.
A focused answer to the experimental-design and statistics requirements of Eduqas A-Level Biology. Covers variables, controls, validity and reliability, types of error and uncertainty, the chi-squared test, correlation and causation, and choosing an appropriate statistical test.
- Adaptations for gas exchange: the features of an efficient exchange surface; surface-area-to-volume ratio; gas exchange in mammals, fish (counter-current flow), insects and plants; and ventilation.
A focused answer to the Eduqas Component 3 statement on gas exchange. Covers the features of an efficient exchange surface, surface-area-to-volume ratio, gas exchange in mammals, fish (counter-current flow), insects and plants, and ventilation.
- Adaptations for transport: the mammalian heart and the cardiac cycle; blood vessels and tissue fluid; haemoglobin and the oxygen dissociation curve; and transport in plants (xylem and phloem).
A focused answer to the Eduqas Component 3 statement on transport. Covers the mammalian heart and the cardiac cycle, blood vessels and tissue fluid, haemoglobin and the oxygen dissociation curve including the Bohr effect, and transport in plants by xylem and phloem.
Sources & how we know this
- Eduqas A Level Biology Specification (A400) — Eduqas (2015)