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: Frequently used for its clear breakdown of chapters (e.g., Books 1A through 8) and integrated School-Based Assessment (SBA) materials. Curriculum Structure (S4–S6) The HKDSE Biology syllabus is divided into a Compulsory Part Elective Part , typically spanning several textbook volumes: Wong Shiu Chi Secondary School Book/Volume Major Topics Covered Book 1A & 1B Hkdse Biology Textbook Pdf