Worksheets on Edexcel GCSE Biology 1.1 Cells and cell structure, covering 1.1.1 Sub-cellular structures and functions, 1.1.2 Specialised cells and their adaptations, and 1.1.3 Microscope technology and cell structures, with answers. Print them, or work through one on screen. Write your working straight onto the paper and Genie marks it question by question against the mark scheme.