CBSE Class 11 Biology Syllabus 2025-26, Download PDF with Marking Scheme
CBSE Class 11 Biology Syllabus 2025-26 is now available on the official website @cbse.gov.in. Here we have provided direct access to the CBSE Class 11 Biology Syllabus in PDF format.
Vikas Pandit14 Aug, 2025
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CBSE Class 11 Biology Syllabus 2025-26: The Central Board of Secondary Education has made the Biology curriculum available to 11th-grade students who choose to attend a senior high school with an academic track.
The CBSE Board's 11th-grade biology curriculum is straightforward, and the concepts flow from one to the next. CBSE Class 11 Biology Syllabus 2025-26 purpose is to demonstrate the fundamental principles that all animals, plants, and microbes share, as well as how discoveries and new concepts in the subject relate to daily life.
Check out and get the CBSE Class 11 Biology Syllabus 2025-26 PDF from the website. This page also includes a list of distinct chapters with key topics and mark distribution.
CBSE Class 11 Biology Syllabus 2025-26
The CBSE Class 11 Biology Syllabus includes the following topics: The Living World: This section introduces fundamental biological concepts such as living beings, cells, and tissues. Cell: The Unit of Life: This unit explains how cells are formed and function. Biomolecules: This section discusses the many types of biomolecules, such as carbohydrates, proteins, and lipids. Metabolism is the study of the chemical changes that occur within living organisms.CBSE Class 11 Biology Syllabus 2025-26 Course Structure
CBSE has released the CBSE Class 11 Biology Syllabus subject structure for this academic year. The latest CBSE Biology class 11 cbse syllabus for NCERT textbooks offers thorough information regarding mark weighting, subject division by unit, and other topics. The class 11 syllabus is going to help students not only for exam preparation but also for NEET preparation.| CBSE Class 11 Biology Syllabus Course structure | ||
| Unit | Title | Marks |
| I | Diversity of Living Organisms | 15 |
| II | Structural Organization in Plants and Animals | 10 |
| III | Cell: Structure and Function | 15 |
| IV | Plant Physiology | 12 |
| V | Human Physiology | 18 |
| Total | 70 | |
CBSE Class 11 Biology Syllabus 2025-26 Question Paper Design
The question paper design for the CBSE Class 11 Biology Syllabus is shown in the table below.| CBSE Class 11 Biology Syllabus Question Paper Design (Theory) | |
| Competencies | |
| Demonstrate Knowledge and Understanding | 50% |
| Application of Knowledge / Concepts | 30% |
| Analyse, Evaluate and Create | 20% |
CBSE Class 11 Biology Syllabus Unit-wise
The CBSE Class 11 Biology Syllabus is comprehensive and demanding. It covers an extensive range of subjects, from foundations to advanced, and it includes a significant practical component that helps students apply their theoretical knowledge in real-world situations. Check out the table below for the unit-wise biology syllabus class 11 cbse 2025-26.| CBSE Class 11 Biology Syllabus Unit-wise | ||
| Unit | Name | Description |
| 1 | Diversity of Living Organisms | Class 11 Biology Syllabus Chapter-1: The Living World Biodiversity; Need for classification; three domains of life; taxonomy and systematics; concept of species and taxonomical hierarchy; binomial nomenclature Class 11 Biology Syllabus Chapter-2: Biological Classification Five kingdom classifications; Salient features and classification of Monera, Protista and Fungi into major groups; Lichens, Viruses and Viroids. Class 11 Biology Syllabus Chapter-3: Plant Kingdom Classification of plants into major groups; Salient and distinguishing features and a few examples of Algae, Bryophyta, Pteridophyta, Gymnospermae (Topics excluded – Angiosperms, Plant Life Cycle and Alternation of Generations) Class 11 Biology Syllabus Chapter-4: Animal Kingdom Salient features and classification of animals, non-chordates up to phyla level and chordates up to class level (salient features and at a few examples of each category). (No live animals or specimens should be displayed.) |
| 2 | Structural Organization in Animals and Plant | Class 11 Biology Syllabus Chapter-5: Morphology of Flowering Plants Morphology of different parts of flowering plants: root, stem, leaf, inflorescence, flower, fruit and seed. Description of the family Solanaceae Class 11 Biology Syllabus Chapter-6: Anatomy of Flowering Plants Anatomy and functions of tissue systems in dicots and monocots. Class 11 Biology Syllabu Chapter-7: Structural Organisation in Animals Morphology, Anatomy and functions of different systems (digestive, circulatory, respiratory, nervous and reproductive) of frogs. |
| 3 | Cell: Structure and Function | Class 11 Biology Syllabus Chapter-8: Cell-The Unit of Life 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. Class 11 Biology Syllabus Chapter-9: Biomolecules Chemical constituents of living cells: biomolecules, structure and function of proteins, carbohydrates, lipids, nucleic acids; Enzyme – types, properties, 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) Class 11 Biology Syllabus Chapter-10: Cell Cycle and Cell Division Cell cycle, mitosis, meiosis and their significance |
| 4 | Plant Physiology | Class 11 Biology Syllabus Chapter-13: Photosynthesis in Higher Plants 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. Class 11 Biology Syllabus Chapter-14: Respiration in Plants 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. Class 11 Biology Syllabus Chapter-15: Plant – Growth and Development Seed germination; phases of plant growth and plant growth rate; conditions of growth; differentiation, dedifferentiation and redifferentiation; Sequence of developmental processes in a plant cell; growth regulators – auxin, gibberellin, cytokinin, ethylene, ABA; |
| 5 | Human Physiology | Class 11 Biology Syllabus Chapter-17: Breathing and Exchange of Gases 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. Class 11 Biology Syllabus Chapter-18: Body Fluids and Circulation 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. Class 11 Biology Syllabus Chapter-19: Excretory Products and Their Elimination Modes of excretion – ammonotelism, ureotelism, uricotelism; human excretory system – structure and function; urine formation, osmoregulation; regulation of kidney function – renin-angiotensin, atrial natriuretic factor, ADH and diabetes insipidus; the role of other organs in excretion; disorders – uremia, renal failure, renal calculi, nephritis; dialysis and artificial kidney, a kidney transplant. Class 11 Biology Syllabus Chapter-20: Locomotion and Movement 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. Class 11 Biology Syllabus Chapter-21: Neural Control and Coordination Neuron and nerves; Nervous system in humans – central nervous system; peripheral nervous system and visceral nervous system; generation and conduction of nerve impulse Class 11 Biology Syllabus Chapter-22: Chemical Coordination and Integration Endocrine glands and hormones; human endocrine system – hypothalamus, pituitary, pineal, thyroid, parathyroid, adrenal, pancreas, gonads; mechanism of hormone action (elementary idea); the role of hormones as messengers and regulators, hypo – and hyperactivity and related disorders; dwarfism, acromegaly, cretinism, goitre, exophthalmic goitre, diabetes, Addison’s disease. Note: Diseases related to all the human physiological systems are to be taught in brief. |
CBSE Class 11 Biology Syllabus 2025-26 for Practical Exams Marking Scheme
The practicals will be worth thirty marks in total, and the test will take 3 hours. In the table below, you can find the assessment criteria for the CBSE Class 11 Biology Syllabus practical examinations.| CBSE Class 11 Biology Syllabus for Practical Exams Marking Scheme | |
| Particulars | Marks |
| One Major Experiment Part A (Experiment No- 1,3,7,8) | 5 |
| One Minor Experiment Part A (Experiment No- 6,9,10,11,12,13) | 4 |
| Slide Preparation Part A (Experiment No- 2,4,5) | 5 |
| Spotting Part B | 7 |
| Practical Record + Viva Voce | 4 |
| Project Record + Viva Voce | 5 |
| Total | 30 |
CBSE Class 11 Biology Syllabus 2025-26 Practicals Works
Below we have provided the list of practical works that can be asked in your exam.A: List of Experiments
Below is the list of experiments that can be performed in the exam.|
List of Experiments |
| Study and describe locally available common flowering plants, from the family Solanaceae (Poaceae, Asteraceae, or Brassicaceae can be substituted in case of particular geographical location) including dissection and display of floral whorls, anther, and ovary to show the number of chambers (floral formulae and floral diagrams), type of root (tap and adventitious); type of stem (herbaceous and woody); leaf (arrangement, shape, venation, simple and compound) |
| Preparation and study of T.S. of dicot and monocot roots and stems (primary). |
| Study of osmosis by potato osmometer. |
| Study of plasmolysis in epidermal peels (e.g. Rhoeo/lily leaves or flashy scale leaves of onion bulb). |
| Study of distribution of stomata on the upper and lower surfaces of leaves. |
| Comparative study of the rates of transpiration in the upper and lower surfaces of leaves. |
| Test for the presence of sugar, starch, proteins, and fats in suitable plant and animal materials. |
| Separation of plant pigments through paper chromatography. |
| Study of the rate of respiration in flower buds/leaf tissue and germinating seeds. |
| Test for the presence of urea in urine. |
| Test for the presence of sugar in the urine. |
| Test for the presence of albumin in the urine. |
| Test for the presence of bile salts in urine. |
B. Study and Observe the following (spotting)
The following table shows the list of observatory experiments.| Study and Observe the following (spotting) |
| Parts of a compound microscope. |
| Specimens/slides/models and identification with reasons - Bacteria, Oscillatoria, Spirogyra, Rhizopus, mushroom, yeast, liverwort, moss, fern, pine, one monocotyledonous plant, one dicotyledonous plant, and one lichen. |
| Virtual specimens/slides/models and identifying features of - Amoeba, Hydra, liver fluke, Ascaris, leech, earthworm, prawn, silkworm, honey bee, snail, starfish, shark, rohu, frog, lizard, pigeon, and rabbit. |
| Mitosis in onion root tip cells and animal cells (grasshopper) from permanent slides. |
| Different types of inflorescence (cymose and racemose). |
| Human skeleton and different types of joints with the help of virtual images/models only |
CBSE Class 11 Biology Syllabus Deleted Syllabus
The CBSE Class 11 Biology Syllabus involves the elimination of concepts, examples, and even whole chapters. Students and instructors should be aware of the eliminated sections to avoid covering them in future courses. Check out the list of deleted syllabus of biology class 11 2025-26 given below.|
CBSE Class 11 Biology Syllabus Deleted Syllabus |
|||
|
Chapter Number |
Chapter Name |
Eliminated/Deleted Topics |
Topics Added |
|
12 |
Mineral Nutrition |
Complete Chapter Revomed |
- |
|
15 |
Plant - Growth and Development |
seed dormancy; vernalisation; photoperiodism. |
- |
|
16 |
Digestion and Absorption |
Complete Chapter Removed |
- |
|
21 |
Neural Control and Coordination |
reflex action; sensory perception; sense organs; Elementary structure and functions of eye and ear |
- |
CBSE Class 11 Biology Exam Preparation Tips
- Examine the whole CBSE Class 11 Biology Syllabus and discover all of the major subjects.
- To complete the programme, just use NCERT books. Keep up to speed with the CBSE 12th examination dates.
- Making notes during self-study is critical for students. This activity improves your grasp of Biology concepts and fosters better comprehension.
- Make it a habit to practice diagrams. Also, label the diagram properly. Practise a diagram at least twice or three times for better control.
- Solve sample papers and CBSE Class 11 previous year's question Papers to learn about the kind of questions that will be asked in the exam. This will help you prepare better for Biology-related subjects.
| Links Related to Other Subjects | |
| CBSE Class 11 Physics Syllabus | CBSE Class 11 English Core Syllabus |
| CBSE Class 11 Chemistry Syllabus | CBSE Class 11 English Elective Syllabus |
| CBSE Class 11 Maths Syllabus | CBSE Class 11 Hindi Syllabus |
CBSE Class 11 Biology Syllabus 2025-26 Download PDF
The CBSE Class 11 Biology Syllabus is an important resource for students studying Biology. This syllabus outlines the topics and concepts that students will cover during the academic year.
Understanding the syllabus helps students plan their study schedule effectively, allocate time for each topic, and ensure comprehensive learning.
With the PDF link provided below, students can easily download and refer to the CBSE Class 11 Biology Syllabus whenever needed. This allows students to stay organized, track their progress and prepare thoroughly for their Biology classes and examinations.
Do you need help with your homework or preparing for exams?
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CBSE Class 11 Biology Syllabus FAQs
What is the CBSE Class 11 Bio 2025 syllabus?
The CBSE Class 11 Biology Syllabus is divided into five parts. Diversity of Living Organisms, Structural Organisation in Plants and Animals, Cell: Structure and Function, Plant Physiology, and Human Physiology are the units in CBSE Class 11 Biology Syllabus.
Is digestion and absorption deleted?
NMC has removed the following chapters from biology: Transport in Plants, Mineral Nutrition, Digestion and Absorption, Reproduction in Organisms, Food Production Enhancement Strategies, and Environmental Issues. The NMC has expanded its physics and biology subtopics by five.
What is the hardest chapter in Biology class 11?
The chapters on cells and cell division are the most challenging since it is tough to recall the difference between miosis and mitosis, as well as the g-phase. Otherwise, everything is extremely fascinating and easy to follow.
Can CBSE fail a student in 11th 2026?
If a student fails to get 33% in more than one subject, he or she will be forced to retake class XI. The test will take place either before or after the planned day and time. A student who is missing from an examination without a valid excuse will be marked absent.
Talk to a counsellorHave doubts? Our support team will be happy to assist you!
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