Edexcel IGCSE Biology Past Papers with Mark Schemes [PDFs]

The modular International GCSE Biology specification (4XBI1) offers a flexible approach to assessment through two equally weighted units (50% each) that can be taken separately and in any order. This modular structure allows students to sit examinations when they feel ready and provides opportunities to resit individual unit assessments before receiving a final qualification grade. Unit 1 covers the nature and variety of living organisms, cell structure, biological molecules, movement of substances, nutrition, respiration, and gas exchange. Unit 2 addresses transport, excretion, coordination, reproduction, inheritance, ecology, and biological resources. Like the linear specification, practical skills are embedded throughout, with investigations highlighted in italics.

The content is designed to be engaging and relevant for international students, with opportunities to contextualize learning. The modular approach particularly benefits students who prefer to demonstrate their knowledge in stages rather than in one final examination period, while still maintaining the same high standards and preparation for advanced study in biological sciences.