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  1. • enzymes are biological catalysts • they speed up reactions in cells without being used up • each enzyme catalyses a different reaction • the production of enzymes is controlled by genes • enzymes are made of protein • the substrate attaches to the

  2. Sciences (9-1) 2017. Download Biology answers. Download Chemistry answers. Download Physics answers. Download Human Biology answers. Download Biology Single Award answers. Download Chemistry Single Award answers. Download Physics Single Award answers. Download Double Award answers.

  3. Edexcel IGCSE Biology: Past Papers. Concise resources for the IGCSE Edexcel Biology course. FREE Biology revision notes on The Unifying Characteristics of Living Organisms. Designed by the teachers at SAVE MY EXAMS for the Edexcel IGCSE Biology syllabus.

  4. enzymes are biological catalysts • they speed up reactions in cells without being used up • each enzyme catalyses a different reaction • the production of enzymes is controlled by genes • enzymes are made of protein • the substrate attaches to the

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  5. Revision for Edexcel Biology IGCSE, including summary notes, exam questions by topic and videos for each module.

  6. International GCSE 9–1 Biology Edexcel Answer key and markscheme © 2018 NTK Academic Group 6 Question number Answer Mark 4 An answer that makes reference to the following two points: biological catalyst (1) speed up metabolic 2

  7. Get access to Edexcel IGCSE Biology Past Papers for effective exam preparation. Practice with previous papers to familiarize yourself with the exam format, identify weak areas, and improve your performance.