The Science in Focus: Biology 'N' Level Theory Workbook is written for students taking the GCE 'N' Level Science (Biology) examination based on the latest syllabus issued by the Ministry of Education. It complements the Science in Focus: Biology 'N' Level Textbook.

This workbook consists of exercises for reinforcement of concepts and principles learnt in the textbook. It includes challenging questions that require students to analyse data as well as a variety of exercises for further practice. There is also a Self-Check list for students to check what they should know and understand in each chapter.

Theme 1 Principles of Biology
- Chapter 1 Cell Structure and Organisation
- Chapter 2 Movement of Substances
- Chapter 3 Biological Molecules

Theme 2 Maintenance and Regulation of Life Processes
- Chapter 4 Nutrtion in Plants
- Chapter 5 Nutrition in Animals
- Chapter 6 Respiration
, etc.

Theme 3 Continuity in Life
- Chapter 9 Reproduction in Plants
- Chapter 10 Sexual Reproduction in Human