Key Points
- CBSE Class 12 exams start Feb 17, 2026; Biology requires focused NCERT prep.
- Prioritize NCERT theory, diagrams, competency questions in the last 10 days.
- Revise high-weightage chapters like Reproduction, Genetics, and Biotechnology.
As the CBSE Class 12 Board Examination 2026 draws closer, the final 10 days become the most decisive phase for students preparing for Biology. Biology is often regarded as one of the highest-scoring subjects in the science stream, provided students revise the syllabus in a structured and exam-oriented manner. The CBSE Biology paper focuses heavily on NCERT-based theory, conceptual clarity, correct terminology, and well-labelled diagrams. Therefore, the last 10 days should be dedicated to systematic revision, diagram practice, competency-based questions, and full-length mock tests rather than learning new topics. This elaborated CBSE Class 12 Biology last 10 days study plan for board exam 2026 is designed to help students revise the complete syllabus efficiently while improving answer presentation and time management.
Why Do the Last 10 Days Matter the Most in Biology?
The final revision phase is crucial because:
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A large portion of Biology questions are direct or indirect NCERT-based
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Diagrams and labelling questions carry assured marks
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Repetition of concepts is common in board exams
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CBSE increasingly focuses on competency-based and application-oriented questions
CBSE Class 12 Biology Exam Pattern 2026
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Exam Conducting Body: Central Board of Secondary Education (CBSE)
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Class: 12 (Senior Secondary Level)
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Subject: Biology
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Total Marks: 100
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Theory Examination: 70 marks
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Practical/Internal Assessment: 30 marks
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Question Types Included:
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Multiple Choice Questions (MCQs)
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Competency-based and case-based questions
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Short answer and long answer questions
The exam evaluates conceptual understanding, clarity of expression, and the ability to apply biological knowledge to real-life situations.
CBSE Class 12 Biology Exam Pattern 2026: Unit-wise Marks distribution
The theory portion of CBSE Class 12 Biology is worth a total of 70 marks. The practicals account for the final thirty points. The chapter-by-chapter exam format and grading system for CBSE Class 12 Biology are described below:
| Topics | Marks |
| Reproduction | 16 |
| Genetics & Evolution | 20 |
| Biology & Human Welfare | 12 |
| Biotechnology & Its Applications | 12 |
| Ecology & Environment | 10 |
| Practical | |
| 1 Major experiment | 5 |
| 1 Minor experiment | 4 |
| Slide preparation | 5 |
| Spotting | 7 |
| Practical record + viva voce | 4 |
| Investigatory Project and Project record + viva voce | 5 |
High-Weightage Chapters in CBSE Class 12 Biology
Students must prioritise chapters that contribute significantly to the overall marks:
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Reproduction (Human reproduction, reproductive health)
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Genetics and Evolution (Inheritance patterns, molecular basis, evolution theories)
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Biotechnology and Its Applications (Recombinant DNA technology, medical applications)
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Ecology and Environment (Ecosystem, biodiversity, environmental issues)
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Biology and Human Welfare (Human health, immunity, microbes in welfare)
These units are not only scoring but are also repeatedly featured in board questions.
CBSE Class 12 Biology Last 10 Days Study Plan 2026 (Day-Wise)
| Day | Topics to Revise | Detailed Focus |
| Day 1 | Reproduction | Human reproductive systems, menstrual cycle, reproductive health, diagrams |
| Day 2 | Genetics and Evolution | Mendelian crosses, pedigree analysis, DNA replication, evolution concepts |
| Day 3 | Biotechnology | rDNA technology steps, enzymes, vectors, applications in health and agriculture |
| Day 4 | Biology and Human Welfare | Diseases, immunity, vaccines, microbes in industry |
| Day 5 | Ecology (Part 1) | Ecosystem structure, energy flow, productivity, nutrient cycles |
| Day 6 | Ecology (Part 2) | Biodiversity, conservation strategies, environmental pollution |
| Day 7 | Diagrams and Terminology | Diagram labelling, biological terms, flowcharts |
| Day 8 | Competency-Based Questions | Case studies, assertion–reason, application questions |
| Day 9 | Full Syllabus Revision | Weak areas, frequently asked questions |
| Day 10 | Sample Paper Practice | One full mock test and final revision |
Daily Time Division for CBSE Class 12 Biology (Last 10 Days)
| Activity | Time Allocation |
| NCERT Theory Revision | 2 hours |
| Diagram Drawing and Labelling Practice | 1 hour |
| MCQs and Competency-Based Questions | 1 hour |
| Case-Based and Application Questions | 1 hour |
| Previous Years’ Questions | 1 hour |
| Sample Paper / Mock Test | 1.5 hours |
| Quick Revision of Notes | 0.5 hour |
Recommended Total Study Time: Around 8 hours per day
Diagram and Presentation Strategy for Biology
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Practise diagrams daily using pencil and ruler
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Use correct biological terminology
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Label diagrams neatly and clearly
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Draw flowcharts for processes like transcription, translation, and ecological cycles
Well-presented diagrams can significantly improve scores in Biology.
Smart Revision Tips for Scoring High in Biology
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Revise NCERT line by line, especially examples and highlighted points
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Focus on keywords and definitions
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Use short notes for Genetics and Biotechnology
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Practise competency-based questions regularly
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Avoid mugging up without conceptual clarity
CBSE Class 12 Date Sheet 2025-26
The CBSE Class 12th exam dates are out for the 2026 board examination. As per the date sheet, the CBSE Class 12 exams will start on Feb 17, 2026. Check the complete CBSE Class 12 Date Sheet 2026 for more information.
The CBSE Class 12 Biology Board Exam 2026 demands focused, disciplined, and NCERT-oriented preparation in the final 10 days. By following this detailed day-wise study plan and daily timetable, students can revise the complete syllabus systematically, strengthen conceptual understanding, and improve exam performance. Regular diagram practice, competency-based question solving, and mock tests will help students approach the Biology board exam with confidence and clarity.
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