CBSE Class 11 Biology Syllabus 2025-26

CBSE Class 11 Biology Syllabus 2025-26

Class 11 Biology Syllabus has been officially released by the Central Board of Secondary Education (CBSE) on its website. This page provides the latest and complete Class 11 Biology syllabus exactly as prescribed by CBSE for the current academic year. This syllabus covers important life processes, ecology, and human biology needed for higher studies and exams like NEET in future classes.

The updated Cbse Class 11 Biology Syllabus 2025-26 helps students understand the chapter-wise distribution of marks, exam pattern and learning outcomes in advance. By checking the official syllabus before starting the course, students can plan their studies in the right order, focus on high-weightage units and complete timely revision before the exam. Some of the important topics covered in the Class 11 Biology syllabus are:

• Living World
• Biological Classification
• Plant Kingdom
• Animal Kingdom
• Morphology and Anatomy of plants
• Cell Biology and Biomolecules
• Cell Cycle and Cell Division
• Plant Physiology
• Human Physiology
• and basic Reproduction concepts

Table of Contents – Class 11 Biology Syllabus

• CBSE Class 11 Biology Syllabus 2025-26
• Overview of CBSE Class 11 Biology
• Evaluation Scheme (Theory) – Marks Distribution
• Unit-wise CBSE Class 11 Biology Syllabus
• Biology Practical Evaluation Scheme (30 Marks)
• List of Experiments and Projects
• Download NCERT Books by Class (1 to 12)
• Frequently Asked Questions on CBSE Class 11 Biology Syllabus 2025-26

Overview of CBSE Class 11 Biology Syllabus 2025-26

Class 11 Biology studies the living world, classification of organisms, plant kingdom, Animal Kingdom, morphology, anatomy, cell structure, biomolecules, cell division, plant physiology and transport in plants. Students learn about plant and animal systems, genetics basics, ecology and biotechnology ideas through theory and practical observation, which also supports exams like NEET and other competitive examinations in later classes.

The Cbse Class 11 Biology syllabus is structured to move from diversity of living organisms to structural organisation, then to cell and biomolecules, and finally to plant and human physiology. Understanding this flow helps students revise systematically and connect topics instead of studying in isolation. Regular use of NCERT textbooks, exemplar questions and previous year question papers will help students score good marks in school exams and build a strong base for Class 12 board exams.

CBSE Class 11 Biology Syllabus – Evaluation Scheme (Theory)

How To use this table: This table gives unit names and marks for the Cbse Class 11 Biology syllabus 2025-26. Focus more on units with higher marks and ensure you cover both theory and NCERT-based diagrams. This helps in planning time for revision, writing practice and solving sample papers.

Units I and III carry 15 marks each, which means students must be very clear with concepts like Biological Classification, Plant Kingdom, Animal Kingdom, cell structure, organelles and cell division. Unit V – Human Physiology has the highest weightage of 18 marks, so topics like digestion, breathing, circulation, excretion and nervous system should be revised multiple times with diagrams and labelled practice.

Unit II and Unit IV together contribute 22 marks and focus on morphology, anatomy and plant physiology (transport, photosynthesis, respiration, growth). These are scoring areas if you prepare neat labelled diagrams, summary notes and practice NCERT questions regularly. Keeping a simple chapter-wise revision timetable ensures that the entire CBSE Class 11 Biology syllabus is completed well before school exams.

Unit-wise CBSE Class 11 Biology Syllabus 2025-26

Along with marks, students should also know which chapters of Class 11 Biology fall under each unit. The table below lists important chapters or sections that are commonly asked in school exams and later in competitive examinations based on the same NCERT syllabus.

Each unit of the CBSE Class 11 Biology syllabus contains multiple chapters from the NCERT textbook. For example, Unit I also includes topics like Biological Classification, Plant Kingdom and Animal Kingdom, which are important for NEET preparation later. Students should regularly revise these topics, solve NCERT back questions and attempt previous year question papers of Class 11 Biology for better exam preparation.

Similarly, Unit III and Unit IV cover the foundation of cell biology and plant physiology. Topics like biomolecules, cell cycle, transport in plants, mineral nutrition, photosynthesis and respiration should be prepared using NCERT diagrams and flowcharts. Maintaining a separate notebook for formulae, definitions and labelled diagrams will make revision very easy during Class 11 annual exams and later in Class 12 board exams.

CBSE Class 11 Biology Practical Evaluation Scheme (30 Marks)

Practical work is an essential part of the CBSE Class 11 Biology syllabus 2025-26. The practical component helps students verify theory concepts through experiments, microscope work, slide preparation and spotting. The marks distribution for practicals is given below.

Students should maintain a neat and complete Biology practical record. All experiments must be written with aim, materials required, procedure, observations and conclusion. Spotting and slide preparation carry good marks and become easy if you revise diagrams and permanent slides regularly during the year. Viva voce questions are usually based on practical experiments and basic NCERT theory, so reading the textbook thoroughly is very important.

Biology Practicals and Projects – Class 11

A: List of Experiments

CBSE prescribes a detailed list of Biology experiments such as preparation and study of plant and animal tissues, osmosis experiments, identification of different specimens and slide preparation. Schools conduct these experiments in the laboratory using microscopes, chemicals and prepared slides. Students should attend all Biology practical classes, complete diagrams in their record book and get them checked by the teacher on time.

B. Study and Observe the Following (Spotting)

Spotting helps students recognise specimens, tissues, flowers, stages of mitosis or meiosis, and other biological materials quickly. During the exam, students are asked to identify and write important features of given slides or specimens. Regular revision of diagrams from the NCERT Biology textbook and laboratory manual will help in scoring full marks in the spotting section.

Important Topics in CBSE Class 11 Biology

The following table highlights some important areas of Class 11 Biology which connect strongly with Class 12 and competitive examinations. Students can use this as a quick reference while planning revision.

By giving more practice time to these important topics, students can improve their overall score in the CBSE Class 11 Biology exam and be better prepared for the Class 12 Biology syllabus and NEET syllabus later. Always start with NCERT, then move to Ncert Exemplar questions and finally solve sample papers for strong exam preparation.

🎓 Download NCERT Books by Class (1 to 12)

Access all NCERT textbooks organized by class. Each class page contains complete books For All subjects with chapter-wise PDFs, solutions, and syllabus coverage. Perfect for systematic learning and CBSE board exam preparation.

Frequently Asked Questions on CBSE Class 11 Biology Syllabus 2025-26