Biology Ial Unit 4 __top__ Jun 2026

Unlike Unit 3, which is coursework-based, Unit 4 is a written examination. It is typically sat by students in Year 13 (or the second year of A-Level study). The unit carries a significant weighting in the final A-Level grade, making proficiency in this paper non-negotiable for university aspirants, particularly those aiming for Medicine, Biomedical Sciences, or Genetics.

: Mastering the non-specific and specific immune responses, including the roles of T-cells, B-cells, antibodies, and the difference between active and passive immunity. Key Resources for Revision biology ial unit 4

The Edexcel IAL Biology Unit 4 exam is titled "Energy, Environment, Microbiology and Immunity" . The paper lasts 1 hour 45 minutes and is worth 90 marks (plus a 10-mark data handling question that is essentially your Unit 3 practical skills applied to Unit 4 content). Unlike Unit 3, which is coursework-based, Unit 4