CBSE Class 11th Biology Syllabus 2025-26: The Central Board of Secondary Education (CBSE) has released the syllabus for Biology for the academic year 2025-26. This syllabus is important for all the students preparing for the annual exams and other future competitive exams like NEET or JEE.
The board has the syllabus aligned with National Curriculum Framework (NCF) and NEP 2025 guidelines. Student, teachers and parents can download the syllabus PDF for free here.
The subject code for Biology is 044. The exam will be of 100 marks that includes a theory of 70 marks and a practical of 30 marks.
Also, check:
CBSE Class 11th Biology Syllabus 2025-26: Unit-Wise Division
Check the unit-wise marking scheme here:
| Unit | Title | Marks |
| I | Diversity of Living Organisms | 15 |
| II | Structural Organisation in Plants and Animals | 10 |
| III | Cell: Structure and Function | 15 |
| IV | Plant Physiology | 12 |
| V | Human Physiology | 18 |
| Total | 70 |
CBSE Class 11th Biology Syllabus 2025-26: Detailed Syllabus
Check the unit-wise detailed syllabus here:
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Unit-I: Diversity of Living Organisms |
| Chapter 1: The Living World |
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Biodiversity; Need for classification; three domains of life; taxonomy and systematics; concept of species and taxonomical hierarchy; binomial nomenclature |
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Chapter-2: Biological Classification |
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Five kingdom classification; Salient features and classification of Monera, Protista and Fungi into major groups; Lichens, Viruses and Viroids. |
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Chapter-3: Plant Kingdom |
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Classification of plants into major groups; Salient and distinguishing features, and a few examples of Algae, Bryophyta, Pteridophyta, Gymnospermae and Angiosperms. |
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Chapter-4: Animal Kingdom |
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Salient features and classification of animals, non-chordates up to phylum level and chordates up to class level (salient features and a few examples of each category). |
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(No live animals or specimens should be displayed.) |
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Unit-II Structural Organisation in Plants and Animals Chapter-5: Morphology of Flowering Plants |
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Morphology of different parts of flowering plants: root, stem, leaf, inflorescence, flower, |
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fruit and seed. Description of family Solanaceae |
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Chapter-6: Anatomy of Flowering Plants |
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Anatomy and functions of tissue systems in dicots and monocots. |
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Chapter-7: Structural Organisation in Animals |
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Morphology, Anatomy and functions of different systems (digestive, circulatory, respiratory, nervous and reproductive) of the frog. |
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Unit-III Cell: Structure and Function |
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Chapter-8: Cell-The Unit of Life |
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Cell theory and cell as the basic unit of life, structure of prokaryotic and eukaryotic cells; Plant cell and animal cell; cell envelope; cell membrane, cell wall; cell organelles - structure and function; endomembrane system, endoplasmic reticulum, golgi bodies, lysosomes, vacuoles, mitochondria, ribosomes, plastids, microbodies; cytoskeleton, cilia, flagella, centrioles (ultrastructure and function); nucleus. |
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Chapter-9: Biomolecules |
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Chemical constituents of living cells: biomolecules, structure and function of proteins, carbohydrates, lipids, and nucleic acids; Enzyme - types, properties, and enzyme action. (Topics excluded: Nature of Bond Linking Monomers in a Polymer, Dynamic State of Body Constituents Concept of Metabolism, Metabolic Basis of Living, The Living State) |
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Chapter-10: Cell Cycle and Cell Division |
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Cell cycle, mitosis, meiosis and their significance |
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Unit-IV Plant Physiology |
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Chapter-11: Photosynthesis in Higher Plants |
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Photosynthesis as a means of autotrophic nutrition; site of photosynthesis, pigments involved in photosynthesis (elementary idea); photochemical and biosynthetic phases of photosynthesis; cyclic and non-cyclic photophosphorylation; chemiosmotic hypothesis; photorespiration; C3 and C4 pathways; factors affecting photosynthesis. |
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Chapter-12: Respiration in Plants |
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Exchange of gases; cellular respiration - glycolysis, fermentation (anaerobic), TCA cycle and electron transport system (aerobic); energy relations - number of ATP molecules generated; amphibolic pathways; respiratory quotient. |
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Chapter-13: Plant Growth and Development |
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Seed germination; phases of plant growth and plant growth rate; conditions of growth; differentiation, dedifferentiation and redifferentiation; sequence of developmental processes |
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in a plant cell; plant growth regulators - auxin, gibberellin, cytokinin, ethylene, ABA. |
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Unit-V Human Physiology Chapter-14: Breathing and Exchange of Gases |
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Respiratory organs in animals (recall only); Respiratory system in humans; mechanism of breathing and its regulation in humans - exchange of gases, transport of gases and regulation of respiration, respiratory volume; disorders related to respiration - asthma, emphysema, occupational respiratory disorders. |
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Chapter-15: Body Fluids and Circulation |
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Composition of blood, blood groups, coagulation of blood; composition of lymph and its function; human circulatory system - Structure of human heart and blood vessels; cardiac cycle, cardiac output, ECG; double circulation; regulation of cardiac activity; disorders of circulatory system - hypertension, coronary artery disease, angina pectoris, heart failure. |
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Chapter-16: Excretory Products and Their Elimination |
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Modes of excretion - ammonotelism, ureotelism, uricotelism; human excretory system – structure and function; urine formation, osmoregulation; regulation of kidney function - renin |
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- angiotensin, atrial natriuretic factor, ADH and diabetes insipidus; role of other organs in excretion; disorders - uremia, renal failure, renal calculi, nephritis; dialysis and artificial kidney, kidney transplant. |
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Chapter-17: Locomotion and Movement |
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Types of movement - ciliary, flagellar, muscular; skeletal muscle, contractile proteins and muscle contraction; skeletal system and its functions; joints; disorders of muscular and skeletal systems - myasthenia gravis, tetany, muscular dystrophy, arthritis, osteoporosis, gout. |
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Chapter-18: Neural Control and Coordination |
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Neuron and nerves; Nervous system in humans - central nervous system; peripheral nervous system and visceral nervous system; generation and conduction of nerve impulse |
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Chapter- 19: Chemical Coordination and Integration |
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Endocrine glands and hormones; human endocrine system - hypothalamus, pituitary, pineal, thyroid, parathyroid, adrenal, pancreas, gonads; mechanism of hormone action (elementary idea); role of hormones as messengers and regulators, hypo - and hyperactivity and related disorders; dwarfism, acromegaly, cretinism, goiter, exophthalmic goitre, diabetes, Addison's disease. |
CBSE Class 11 Biology Practical Syllabus 2025-26
Check the practical syllabus for the Biology subject below:
| Evaluation Scheme | Marks | |
| One Major Experiment Part A (Experiment No- 1,3,7,8) | 5 Marks | |
| One Minor Experiment Part A (Experiment No- 6,9,10,11,12,13) | 4 Marks | |
| Slide Preparation Part A (Experiment No- 2,4,5) | 5 Marks | |
| Spotting Part B | 7 Marks | |
| Practical Record + Viva Voce | (Credit to the student’s work over the academic session may be given) | 4 Marks |
| Project Record + Viva Voce | 5 Marks | |
| Total | 30 Marks | |
If the students want to get the complete details, then they can check the direct link below:
Direct Link Here:
CBSE Class 11th Biology Syllabus 2025-26: FREE PDF Download |
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