# CBSE Class 11 Biology Syllabus 2026-27, Unit Marks | SwaVid CBSE Class 11 Biology syllabus 2026-27: 70 marks theory, 3 hours and 30 marks practical. Official marks, unit by unit, with the source page linked. Canonical: https://www.swavid.com/cbse/class-11/biology/syllabus Source: https://www.swavid.com/cbse/class-11/biology/syllabus # Class 11 Biology Syllabus 2026-27 ## Unit-wise marks ## Practical: 30 marks ## Good to know ## NCERT textbook chapters ## Practise this syllabus ## Questions parents ask ## Find the earlier idea your child is missing ### Class 11 exams are set by the school ### Biology (Class XI) ### Class 11 Biology CBSE’s official unit marks, the chapters in each unit and the paper design. CBSE prints marks for units, not for individual chapters. Theory is 70 marks. CBSE prints marks for each unit, not for each chapter. Source : CBSE Curriculum 2026-27, Biology (044) Class XI-XII , p.3 CBSE does not publish marks for individual chapters. A claim such as “one chapter carries 6 marks” is not from CBSE. Use the unit marks. Short answer. The Class 11 Biology theory paper is 70 marks and 3 hours. The practical is 30 marks. Class 11 exams are set by the school. The marks are split over 5 units: Diversity of Living Organisms 15, Structural Organization in Plants and Animals 10, Cell: Structure and Function 15, Plant Physiology 12 and Human Physiology 18. Source : CBSE Curriculum 2026-27, Biology (044) Class XI-XII , p.3 Checked against the official CBSE pages on 3 November 2026. 2026-27 is the latest curriculum CBSE has published. CBSE says: "The assessment scheme will be similar to class XII Board examination and shall be carried out at school level." CBSE does not hold a Class 11 board exam, and it does not publish Class 11 sample papers, past papers or a date sheet. Source : CBSE Introduction to Senior Secondary Curriculum (Part 2) 2026-27 , p.14 The practical exam is 3 hours. Source : CBSE Curriculum 2026-27, Biology (044) Class XI-XII , p.6 CBSE includes Digestion and Absorption in the Class 11 syllabus but assesses it formatively only. Source : CBSE Curriculum 2026-27, Biology (044) Class XI-XII , p.6 The chapter lists printed in the NCERT books (Reprint 2026-27). Match topics to the CBSE units above by name. Source : NCERT textbook page: Biology (Class XI) , contents Syllabus, sample paper and past papers for this subject on one page. The theory paper is 70 marks and 3 hours. The practical is 30 marks. Human Physiology carries the most, 18 of the 70 marks. No. CBSE publishes marks per unit only. Chapter-wise weightage tables on other sites are not from CBSE. No. CBSE says the Class 11 assessment is similar to the Class 12 board exam and is carried out at school level. CBSE does not issue sample papers or date sheets for Class 11. SwaVid finds the earlier idea a student is missing, repairs it, then teaches the topic step by step. Backed by Lumikai, Good Game Investments and PIEDS, BITS Pilani · Trusted by 6,000+ families - SwaVid - CBSE - Class 11 - Biology - Syllabus 2026-27 - 70 marks theory - 3 h exam time - 30 practical - Unit I: 1 The Living World - 2 Biological Classification - 3 Plant Kingdom - 4 Animal Kingdom - Unit II: 5 Morphology of Flowering Plants - 6 Anatomy of Flowering Plants - 7 Structural Organisation in Animals - Unit III: 8 Cell: The Unit of Life - 9 Biomolecules - 10 Cell Cycle and Cell Division - Unit IV: 11 Photosynthesis in Higher Plants - 12 Respiration in Plants - 13 Plant Growth and Development - Unit V: 14 Breathing and Exchange of Gases - 15 Body Fluids and Circulation - 16 Excretory Products and their Elimination - 17 Locomotion and Movement - 18 Neural Control and Coordination - 19 Chemical Coordination and Integration ## Key Links - [SwaVid](https://www.swavid.com/) - [CBSE](https://www.swavid.com/cbse) - [Class 11](https://www.swavid.com/cbse/class-11) - [Biology](https://www.swavid.com/cbse/class-11/biology) - [Start free →](https://www.swavid.com/signup) - [Open the official PDF](https://cbseacademic.nic.in/web_material/CurriculumMain27/SecPart2/Biology_SecP2_2026-27.pdf) - [CBSE Curriculum 2026-27, Biology (044) Class XI-XII](https://cbseacademic.nic.in/web_material/CurriculumMain27/SecPart2/Biology_SecP2_2026-27.pdf) - [CBSE Curriculum 2026-27, Biology (044) Class XI-XII](https://cbseacademic.nic.in/web_material/CurriculumMain27/SecPart2/Biology_SecP2_2026-27.pdf) - [CBSE Introduction to Senior Secondary Curriculum (Part 2) 2026-27](https://cbseacademic.nic.in/web_material/CurriculumMain27/SecPart2/Curriculum_SecP2_2026-27.pdf) - [CBSE Curriculum 2026-27, Biology (044) Class XI-XII](https://cbseacademic.nic.in/web_material/CurriculumMain27/SecPart2/Biology_SecP2_2026-27.pdf) - [CBSE Curriculum 2026-27, Biology (044) Class XI-XII](https://cbseacademic.nic.in/web_material/CurriculumMain27/SecPart2/Biology_SecP2_2026-27.pdf) - [NCERT textbook page: Biology (Class XI)](https://ncert.nic.in/textbook.php?kebo1=0-19) - [Open the subject page](https://www.swavid.com/cbse/class-11/biology) - [Start free →](https://www.swavid.com/signup)