CBSE Class 11 Biology Syllabus is a core subject for students preparing for medical and life-science careers. The updated Biology Syllabus Class 11 CBSE 2025-26 focuses on conceptual clarity, scientific inquiry, and practical understanding of living systems.
Students must follow the latest Syllabus of Biology Class 11 CBSE 2025-26 to remain aligned with CBSE’s academic framework.
CBSE Class 11 Biology Syllabus 2025-26
The CBSE Class 11 Biology Syllabus is divided into major units such as Diversity in Living World, Structural Organisation in Animals and Plants, Cell Structure and Function, Plant Physiology, and Human Physiology. The Syllabus of Biology Class 11 CBSE 2025-26 is designed to build strong biological concepts, observational skills, and analytical thinking.
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CBSE Class 11 Biology Syllabus 2025-26 |
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Unit Title |
Marks |
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I – Diversity of Living Organisms |
15 |
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II – Structural Organisation in Plants and Animals |
10 |
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III – Cell: Structure and Function |
15 |
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IV – Plant Physiology |
12 |
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V – Human Physiology |
18 |
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Total |
70 |
Detailed Biology Syllabus Class 11 CBSE 2025-26
The Biology Syllabus Class 11 CBSE 2025-26 provides a chapter-wise breakdown of theoretical concepts. This chapter is included in the CBSE syllabus for Class 11th:
Unit I: Diversity of Living Organism
Chapter 1: The Living World
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What is living?
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Biodiversity
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Need for classification
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Three domains of life
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Taxonomy and systematics
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Concept of species
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Taxonomical hierarchy
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Binomial nomenclature
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Tools for the study of taxonomy
Chapter 2: Biological Classification
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Five kingdom classification
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Salient features and classification of Monera, Protista and Fungi
Chapter 3: Plant Kingdom
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Salient features and classification of plants into major groups
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Angiosperms
Chapter 4: Animal Kingdom
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Salient features and classification of animals
Unit II: Structural Organisation in Animals and Plants
Chapter 5: Morphology of Flowering Plants
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Morphology and modifications: Tissues
Chapter 6: Anatomy of Flowering Plants
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Anatomy and functions of different parts of flowering plants
Chapter 7: Structural Organisation in Animals
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Animal tissues
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Morphology
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Anatomy and functions of different systems of an insect (Cockroach)
Unit III: Cell Structure and Function
Chapter 8: Cell-The Unit of Life
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Cell theory and cell as the basic unit of life
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Plant cell and animal cell
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Cell envelope
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Cell organelle’s structure and function
Chapter 9: Biomolecules
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Chemical constituents of living cells
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Biomolecules
Chapter 10: Cell Cycle and Cell Division
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Cell cycle
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Mitosis
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Meiosis
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Significance
Unit IV: Plant Physiology
Chapter 11: Transport in Plants
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Transport in plants
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Movement of water, gad & nutrients
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Cell transport
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Plant-water relations
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Long-distance transport of water
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Transpiration
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Uptake and translocation of mineral
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Diffusion of gases
Chapter 12: Mineral Nutrition
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Essential minerals
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Macro and micro-nutrients and their role
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Deficiency symptoms
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Mineral toxicity
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Elementary idea of hydroponics as a method to study mineral nutrition
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Nitrogen metabolism
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Nitrogen cycle
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Biological nitrogen fixation
Chapter 13: Photosynthesis in Higher Plants
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Cyclic and non-cyclic photophosphorylation
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Chemiosmotic hypothesis
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Photorespiration
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C3 and C4 pathways
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Factors affecting photosynthesis
Chapter 14: Respiration in Plants
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Exchange of gases
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Cellular respiration
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Amphibolic pathways
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Respiratory quotient
Chapter 15: Plant - Growth and Development
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Seed germination
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Phases of plant growth and plant growth rate
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Conditions of growth
Unit V: Human Physiology
Chapter 16: Digestion and Absorption
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Alimentary canal and digestive glands
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Peristalsis
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Digestion
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Egestion
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Nutritional and digestive disorders
Chapter 17: Breathing and Exchange of Gases
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Respiratory organs in animals
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Respiratory system in humans
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Mechanism of breathing and its regulation in humans
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Disorders related to respiration
Chapter 18: Body Fluids and Circulation
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Composition of blood
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Composition of lymph and its function
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The human circulatory system
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Cardiac cycle
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Double circulation
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Regulation of cardiac activity
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Disorders of the circulatory system
Chapter 19: Excretory Products and Their Elimination
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Modes of excretion
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Human excretory system
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Urine formation
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Regulation of kidney function
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Role of other organs in excretion
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Disorders
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Dialysis and artificial kidney
Chapter 20: Locomotion and Movement
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Types of movement
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Skeletal system and its functions
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Joints
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Disorders of the muscular and skeletal system
Chapter 21: Neural Control and Coordination
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Neuron and nerves
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Generation and conduction of nerve impulse
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Reflex action
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Sensory perception
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Sense organs
Chapter 22: Chemical Coordination and Integration
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Endocrine glands and hormones
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Human endocrine system
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Mechanism of Hormone Action
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Role of hormones as messengers
Biology Syllabus Class 11 CBSE 2025-26 Practical Assessment
The practical component of the Syllabus of Biology Class 11 CBSE 2025-26 emphasizes laboratory experiments, specimen study, biological drawings, and record maintenance. Internal assessment includes practical work, periodic tests, activities, and viva-voce:
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Biology Syllabus Class 11 CBSE 2025-26 Practical Assessment |
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Experiments |
Marks |
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One Major Experiment (Exp. No. 1, 3, 7, or 8) |
5 |
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One Minor Experiment (Exp. No. 6, 9, 10, 11, 12, or 13) |
4 |
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Part A: Slide Preparation (Exp. No. 2, 4, or 5) |
5 |
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Part B: Spotting |
7 |
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Part C: Practical Record & Viva Voce |
4 |
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Project Record & Viva Voce |
5 |
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Total |
30 |
Biology Deleted Syllabus Class 11 CBSE 2025-26
CBSE has removed certain topics from the Biology Syllabus Class 11 CBSE 2025-26. The deleted part of the syllabus is given here:
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Biology Deleted Syllabus Class 11 CBSE 2025-26 |
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Unit |
Chapter Number |
Chapter Name |
Eliminated/Deleted Topics |
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Diversity of Living Organisms |
1 |
The living world |
– tools for the study of taxonomy |
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Plant Kingdom |
3 |
Plant Kingdom |
– Angiosperms, Plant Life Cycle, Alternation of Generations |
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Structural Organization in Animals and Plants |
5 |
Morphology of Flowering Plants |
– tissue systems in dicots and monocots |
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Cell Structure and Function |
9 |
Biomolecules |
– Nature of Bond Linking Monomers in a Polymer, Dynamic State of Body Constituents (Metabolic Basis for Living) |
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Plant Physiology |
11 |
Transport in Plants |
– Complete Chapter Removed |
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Plant Physiology |
12 |
Mineral Nutrition |
– Complete Chapter Removed |
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Plant Physiology |
13 |
Plant – Growth and Development |
– |
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Human Physiology |
16 |
Digestion and Absorption |
– Complete Chapter Removed |
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Neural Control and Coordination |
19 |
Neural Control and Coordination |
– |