WJEC AS Biology specification (2400)
Understanding the exam specification is key to doing well in your WJEC AS Biology exam. It lays out exactly what you need to learn, how you'll be assessed, and what skills the examiners seek. Whether you're working through the course for the first time or revising for your final exams, the specification helps you stay focused and confident in your preparation.
We've included helpful revision tools to support you in putting the specification into practice. Wherever you're starting from, you'll find everything you need to feel prepared, from the official specification to high-quality resources designed to help you succeed.
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In the next section, you'll find a simplified summary of the official WJEC AS Biology specification, along with a breakdown of key topics, assessment structure, and useful study resources. We've also included links to topic-level guides and revision tools to help you put the specification into practice.
Contents
Disclaimer
This page includes a summary of the official WJEC AS Biology (2400) specification, provided to support your revision. While we've made every effort to ensure accuracy, Save My Exams is not affiliated with the awarding body.
For the most complete and up-to-date information, we strongly recommend consulting the official WJEC specification PDF.
Specification overview
This AS Biology course (WJEC) provides learners with an introduction to core biological principles, supporting both academic progression and real-world application. It encourages the development of analytical and practical skills through the study of cell biology, biochemistry, physiology, and classification. The course promotes scientific enquiry and ethical awareness, laying a strong foundation for careers in life sciences, healthcare, or further biological study.Subject content breakdown
Unit 1: Basic biochemistry and cell organisation
- Chemical elements and biological compounds
- Cell structure and organisation: prokaryotic and eukaryotic
- Plasma membranes: structure and transport
- Enzymes: properties, mechanism, factors affecting activity
- Nucleic acids and DNA replication
- Cell division: mitosis and meiosis
Unit 2: Biodiversity and physiology of body systems
- Biodiversity and classification: species concept, classification systems
- Gas exchange and transport systems:
- Structure and function in mammals and insects
- Cardiovascular system: heart, blood vessels, blood
- Immunology: non-specific and specific immune response
- Human impact on biodiversity: conservation and sustainability
Assessment structure
AS Unit 1: Basic Biochemistry and Cell Organisation
- Written exam: 1 hour 30 minutes
- 80 marks (20% of A level)
- Mixture of short and structured questions
- Includes one extended response and practical-based questions
AS Unit 2: Biodiversity and Physiology of Body Systems
- Written exam: 1 hour 30 minutes
- 80 marks (20% of A level)
- Mixture of short and structured questions
- Includes one extended response and practical-based questions
Assessment Approach
- Linear structure: both units assessed at end of AS course
- Practical skills assessed within written papers
- Mathematical demand embedded (minimum 10%)
- Each paper includes questions requiring data analysis, experimental understanding, and written communication
Grading
- AS is a stand-alone qualification
- Contributes 40% to full A level if combined with A2 units
Key tips for success
Doing well in your WJEC AS Biology isn't just about how much you study, but how you study. Here are a few proven tips to help you stay on track
- Start with a clear plan: Break the subject into topics and create a revision schedule that allows enough time for each. Start early to avoid last-minute stress.
- Focus on understanding, not memorising: Use our revision notes to build a strong foundation in each topic, making sure you actually understand the material.
- Practise regularly: Attempt past papers to familiarise yourself with the exam format and timing. Mark your answers to see how close you are to full marks.
- Be strategic with your revision: Use exam questions by topic to focus on weaker areas, and flashcards to reinforce important facts and terminology.
- Learn from mistakes: Whether it's from mock exams or practice questions, spend time reviewing what went wrong and why. This helps prevent repeat mistakes in the real exam.
- Stay balanced: Don't forget to take regular breaks, eat well, and get enough sleep, a healthy routine makes revision much more effective.
With the right approach and consistent practice, you'll build confidence and improve your chances of exam success.
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