CBSE Study Plan for Class 12 Biology: A well-structured study plan is essential for effective exam preparation, especially when facing the challenges of Class 12 board exams. With a vast syllabus to cover and limited time, a study plan helps you stay organized, manage your time efficiently, and ensure that every topic is thoroughly studied.
For CBSE Class 12 Biology, having a clear study plan ensures that you cover all essential concepts for thorough understanding and high performance in the exam. The 90 Day study plan provided in this article is divided into three phases—Preparation, Practice, and Last-Minute Revision. This plan allows for steady progress and focused study, helping you build confidence and improve your performance in the exam. Students can follow this plan or customize it according to their individual needs and preferences to make the most of their time and achieve success in their CBSE Class 12 Biology Exam 2025.
Day-Wise Study Plan for CBSE Class 12 Biology
Phase 1: Preparation (Days 1–60)
Focus on covering the syllabus and building a strong conceptual foundation during the first 60 days.
| Day | Unit/Chapter | Topics to Study |
| 1 | Chapter 2: Sexual Reproduction in Flowering Plants | Flower structure; Development of male and female gametophytes. |
| 2 | Pollination: Types, agencies, examples, outbreeding devices. | |
| 3 | Pollen-pistil interaction; Double fertilization. | |
| 4 | Post-fertilization events: Endosperm and embryo development. | |
| 5 | Development of seed and fruit; Apomixis, parthenocarpy, polyembryony. | |
| Also Check: CBSE Class 12 Biology Syllabus 2024-2025 PDF | ||
| 6 | Chapter 3: Human Reproduction | Male and female reproductive systems; Microscopic anatomy of testis and ovary. |
| 7 | Gametogenesis: Spermatogenesis and oogenesis. | |
| 8 | Menstrual cycle; Fertilization and embryo development up to blastocyst formation. | |
| 9 | Implantation; Pregnancy and placenta formation. | |
| 10 | Parturition and lactation (elementary idea). | |
| 11 | Chapter 4: Reproductive Health | Need for reproductive health; STDs; Birth control - need and methods. |
| 12 | Medical termination of pregnancy (MTP); Amniocentesis. | |
| 13 | Infertility; Assisted reproductive technologies - IVF, ZIFT, GIFT. | |
| 14 | Chapter 5: Principles of Inheritance and Variation | Mendelian inheritance; Deviations: Incomplete dominance, co-dominance, multiple alleles. |
| 15 | Blood group inheritance; Polygenic inheritance; Chromosome theory of inheritance. | |
| 16 | Sex determination in humans, birds, and honeybee. | |
| 17 | Linkage and crossing over; Sex-linked inheritance. | |
| 18 | Mendelian disorders: Thalassemia, haemophilia. | |
| 19 | Chromosomal disorders: Down’s syndrome, Turner’s and Klinefelter’s syndromes. | |
| 20 | Chapter 6: Molecular Basis of Inheritance | Search for genetic material; Structure of DNA and RNA. |
| 21 | DNA packaging; DNA replication. | |
| 22 | Central Dogma: Transcription, translation, and genetic code. | |
| 23 | Gene expression and regulation: Lac operon. | |
| 24 | Human genome project; DNA fingerprinting. | |
| 25 | Chapter 7: Evolution | Origin of life; Biological evolution and evidences. |
| 26 | Darwin’s contribution; Modern synthetic theory of evolution. | |
| 27 | Mechanisms of evolution: Variation, mutation, recombination, natural selection. | |
| 28 | Gene flow, genetic drift; Hardy-Weinberg principle. | |
| 29 | Adaptive radiation; Human evolution. | |
| 30 | Chapter 8: Human Health and Diseases | Pathogens and parasites causing diseases (malaria, dengue, typhoid, etc.). |
| 31 | Immunology basics: Vaccines; Cancer, HIV, AIDS. | |
| 32 | Adolescent issues: Drug and alcohol abuse. | |
| 33 | Chapter10: Microbes in Human Welfare | Microbes in food processing and industrial production. |
| 34 | Microbes in sewage treatment and energy generation. | |
| 35 | Microbes as biocontrol agents and biofertilizers; Antibiotics and their use. | |
| 36 | Chapter 11: Biotechnology - Principles and Processes | Genetic engineering: Recombinant DNA technology. |
| 37 | Chapter 12: Biotechnology and its Applications | Human insulin, vaccines, stem cell technology, gene therapy. |
| 38 | Genetically modified organisms: Bt crops, transgenic animals; Biosafety issues. | |
| 39 | Chapter 13: Organisms and Populations | Population interactions: Mutualism, competition, predation, parasitism. |
| 40 | Population attributes: Growth, birth rate, death rate, age distribution. | |
| 41 | Chapter 14: Ecosystem | Ecosystem components; Productivity, decomposition, energy flow, ecological pyramids. |
| 42 | Chapter 15: Biodiversity and Its Conservation | Biodiversity concept, patterns, significance, loss, and conservation strategies. |
| 43-60 | Revision of all chapters | Review notes, diagrams, and short questions for Units 6-10. |
Check:
NCERT Book for Class 12 Biology
NCERT Solutions for Class 12 Biology
Phase 2: Practice (Days 61–80)
Solve past year questions, NCERT examples and exercise questions, and questions from reference books to assess your knowledge and strengthen the key concepts. Given below is the day-wise plan to practice the CBSE Class 12 Biology Syllabus before the exam:
| Day | Activity |
| 61-63 | Practice Unit-6: Reproduction |
| 64-66 | Practice Unit-7: Genetics and Evolution |
| 67-69 | Practice Unit-8: Biology and Human Welfare |
| 70-72 | Practice Unit-9: Biotechnology |
| 73-75 | Practice Unit-10: Ecology and Environment |
| 76-80 | Take the full syllabus mock tests for self-evaluation. Focus on time management. |
CBSE Class 12 Biology Sample Paper for Board Exam 2025
CBSE Class 12 Biology Exam Pattern 2025 with Topic-Wise Weightage
Phase 3: Last-Minute Revision (Days 81–90)
Focus on reviewing key concepts, diagrams, frequently asked questions and practising mock papers for effective revision.
| Day | Activity |
| 81-83 | Revise Units 6 and 7: Reproduction, Genetics, and Evolution. |
| 84-86 | Revise Units 8 and 9: Human Health, Diseases, and Biotechnology. |
| 87-88 | Revise Unit 10: Ecology and Environment. |
| 89-90 | Solve sample papers under timed conditions. Focus on presentation and time management. |
Top 10 Tips for Last Minute Revision
The 10 Most Effective Tips to Revise CBSE Class 12 Biology in Last 10 Days are mentioned below:
1. Revise NCERT Thoroughly: Focus on key concepts, diagrams, and summary points from the textbook.
2. Prioritize High-Weightage Topics: Genetics, Biotechnology, Human Physiology, and Ecology are crucial.
3. Practice Important Diagrams: Master diagrams like DNA structure, reproductive systems, and ecosystems.
4. Solve Previous Year Papers: Attempt daily mock tests to familiarize yourself with question patterns.
5. Use Short Notes and Flashcards: Quickly review definitions, processes, and important terms.
6. Memorize Key Terms: Focus on keywords like apomixis, polyembryony, pleiotropy, and genetic drift.
7. Master Assertion-Reason Questions: Practice assertion-reason and case-based questions for better application.
8. Review Weak Areas: Identify and revise topics you find challenging.
9. Stick to a Schedule: Follow a structured schedule to stay organized and cover all topics efficiently.
10. Stay Calm and Healthy: Sleep well and eat healthy to keep yourself focused and energized.
These concise tips, along with the 90-day study plan, will help you prepare effectively and perform well in your CBSE Class 12 Biology Board Exam 2025.
Also Check: NCERT Exemplar Solutions for Class 12 Biology
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