ISC (CISCE) Class 12 Biology syllabus
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- Human Reproduction (menstrual cycle, hormone regulation, placenta)(Reproduction)
Oswaal Books' ISC 2026 board-exam-prep article flags this as a frequent source of diagrammatic questions.
- Mendelian Inheritance, Dihybrid Crosses, Chromosomal Disorders(Genetics and Evolution)
Oswaal Books names this as recurring content within Genetics and Evolution, which it calls the highest-weightage unit (though this conflicts with the official CISCE marks table, see Reproduction entry above).
- DNA Replication, Transcription and Translation (Molecular Basis of Inheritance)(Genetics and Evolution)
Oswaal Books names this a recurring diagram-based long-answer topic.
- Genetic Engineering, Recombinant DNA Technology, PCR(Biotechnology)
Oswaal Books calls Biotechnology content "direct and predictable" in ISC board exams.
- Ecosystem Structure, Energy Flow and Biodiversity Conservation(Ecology and Environment)
Oswaal Books states this topic "consistently" appears in ISC Biology board papers.