Enzymes and the factors affecting them, cell metabolism, and movement of materials across the cell membrane (osmosis, diffusion).
50 past Biology questions on this topic, spanning 2015-2025. Each is listed under the year it appeared; open a year for the official exam paper and marking scheme PDFs.
All PDFs open on the State Examinations Commission archive (examinations.ie). ExamAI links to them; we don't host or alter them.