ISC Biology (Paper 1 — Theory) — Specimen Question Paper 2026
ISC Class XII Board Examination · Biology
- Marks
- 70 marks
- Duration
- Not verified
ISC Class XII · ICSE
Chapter-wise questions, previous-year questions and papers for Biology at ISC Class XII Board Examination.
Mapped from the published ICSE syllabus and linked back to cisce.org. Question counts are live.
1. Sexual Reproduction in Flowering Plants
Flower structure, microsporogenesis and megasporogenesis, pollination, double fertilisation, and seed and fruit formation.
2. Human Reproduction
The male and female reproductive systems, gametogenesis, the menstrual cycle, fertilisation, implantation and lactation.
3. Reproductive Health
Population control, contraception, medical termination of pregnancy, sexually transmitted infections and infertility.
4. Principles of Inheritance and Variation
Mendel's laws, incomplete dominance, codominance, linkage, sex determination, pedigree analysis and genetic disorders.
5. Molecular Basis of Inheritance
DNA as the genetic material, replication, transcription, the genetic code, translation, the lac operon and the Human Genome Project.
6. Evolution
Origin of life, evidence for evolution, Darwinism, the Hardy-Weinberg principle and human evolution.
11. Organisms and Populations
Adaptations, population attributes, growth models and population interactions.
12. Ecosystem
Productivity, decomposition, energy flow, ecological pyramids, succession and nutrient cycling.
13. Biodiversity and Conservation
Patterns of biodiversity, causes of loss, and in-situ and ex-situ conservation.
Chapter mapping:ISC syllabus (CISCE)
ISC Class XII Board Examination · Biology
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