Latest CBSE Class 11 Syllabus Biology 2023-24- Download

class 11 biology syllabus

The students who opted for the bio stream in class 11th for the medical lines are notified that CBSE has reduced CBSE class 11 syllabus 2021-22 by 30%. The biology stream in higher classes is an important subject to consider and should prepare well to open doors of vast opportunity for the future.

The students should know the syllabus pattern that decides the question paper pattern in exams. By going through the syllabus structure students can have an idea of the topic distribution and the possible marking scheme in exams. CBSE class 11th syllabus for biology includes the projects, practical syllabus, and assignments. You can download Biology Class XI CBSE Syllabus from the link given below:

The Vidya Setu as its name expresses the intention of making education possible to every student by connecting them like a bridge.

Vidya Setu offers free online video lectures regarding all the subjects of class 11th and 12th. Due to the Covid-19 pandemic we faced, it is not worthy to have classroom coaching. Hence Vidya Setu can be proved very efficient to provide free online coaching to all the students that is very important to make good preparation even in the Covid 19 pandemic situations. Every student of Class 11th and 12th can visit Vidya Setu to enjoys the video lectures in the Covid 19 crisis, regarding each and every subject, irrespective of the stream selected. Science students looking for another subject syllabus like CBSE class 11 Chemistry syllabus 2021-22 and class 12 syllabus.

UnitTitleNo.of PeriodsMarks
IDiversity of Living Organisms2712
IIStructural Organisation in Plants and Animals2712
IIICell: Structure and Function2612
IVPlant Physiology4017
VHuman Physiology4017

CBSE Class 11 Biology Syllabus: Units & Chapters

Due to covid-19, the central board of secondary education has reduced the NCERT class 11 biology syllabus. You can find both biology reduced syllabus class 11 and biology class 11 deleted chapters. Class 11 biology syllabus NCERT 2021-22 is required for every student to study properly.

Name of the UnitName of the Chapter
Unit 1 – Diversity of Living OrganismsChapter 1:The Living World
Chapter 2:Biological Classification
Chapter 3:Plant Kingdom
Chapter 4:Animal Kingdom
Unit 2 – Structural Organization in AnimalsChapter 5:Morphology of Flowering Plants
Chapter 7:Structural Organisation in Animals
Unit 3 – Cell: Structure and FunctionChapter 8:Cell: The Unit of Life
Chapter 9:Biomolecules
Chapter 10:Cell Cycle and Cell Division
Unit 4 – Plant PhysiologyChapter 13:Photosynthesis in Higher Plants
Chapter 14:Respiration in Plants
Chapter 15:Plant – Growth and Development
Unit 5 – Human PhysiologyChapter 17:Breathing and Exchange of Gases
Chapter 18:Body Fluids and Circulation
Chapter 19:Excretory Products and their Elimination
Chapter 20:Locomotion and Movement
Chapter 21:Neural Control and Coordination
Chapter 22:Chemical Coordination and Integration

Also Know: CBSE Class 11th Detailed Marking Scheme and Question Paper Design

Reduced 30% CBSE Class 11 Biology Syllabus 2021-22: Have a Look



Unit-I Diversity of Living Organisms

Chapter-1: The Living WorldWhat is living? Biodiversity; Need for classification; Three domains of life; taxonomy and systematics; the concept of species and taxonomic hierarchy; binomial nomenclature; tools for the study of taxonomy- museums, zoological parks, herbaria, botanical gardens, keys for identification.
Chapter-2: Biological ClassificationFive kingdom classification; Salient features and classification of Monera, Protista, and Fungi into major groups; Lichens, Viruses, and Viroids.
Chapter-3: Plant KingdomSalient features and classification of plants into major groups – Algae, Bryophyta, Pteridophyta, Gymnosperms, and Angiosperms (salient and distinguishing features and a few examples of each category); Angiosperms – classification up to class, characteristic features, and examples.
Chapter-4: Animal KingdomSalient features and classification of animals, non-chordates up to phyla level and chordates up to class level (salient features and distinguishing features of a few examples of each category). (No live animals or specimens should be displayed.)

Unit-II Structural Organization in Animals and Plants

Chapter-5: Morphology of Flowering PlantsMorphology and modifications: Morphology of different parts of flowering plants: root, stem, leaf, inflorescence, flower, fruit and seed. Description of families: Fabaceae, Solanaceae and Liliaceae (to be dealt along with the relevant experiments of the Practical Syllabus).
Chapter-6: Anatomy of Flowering PlantsAnatomy and functions of different tissues and tissue systems in dicots and monocots. Secondary growth
Chapter-7: Structural Organisation in AnimalsAnimal tissues; Morphology, Anatomy and functions of different systems (digestive, circulatory, respiratory, nervous and reproductive) of an insect-cockroach (a brief account only).

Unit-III Cell: Structure and Function

Chapter-8: Cell-The Unit of LifeCell 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.
Chapter-9: BiomoleculesChemical constituents of living cells: biomolecules, structure and function of proteins, carbohydrates, lipids, nucleic acids; Enzymes- types, properties, enzyme action.
Chapter-10: Cell Cycle and Cell DivisionCell cycle, mitosis, meiosis and their significance

Unit-IV Plant Physiology

Chapter-11: Transport in PlantsMovement of water, gases and nutrients; cell to cell transport, diffusion, facilitated diffusion, active transport; plant-water relations, imbibition, water potential, osmosis, plasmolysis; long distance transport of water – Absorption, apoplast, symplast, transpiration pull, root pressure and guttation; transpiration, opening and closing of stomata; Uptake and translocation of mineral nutrients – Transport of food, phloem transport, mass flow hypothesis.
Chapter-12: Mineral NutritionEssential minerals, macro- and micronutrients and their role; deficiency symptoms; mineral toxicity; elementary idea of hydroponics as a method to study mineral nutrition; nitrogen metabolism, nitrogen cycle, biological nitrogen fixation.
Chapter-13: Photosynthesis in Higher PlantsPhotosynthesis 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.
Chapter-14: Respiration in PlantsExchange 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.
Chapter-15: Plant – Growth and DevelopmentSeed 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; seed dormancy; vernalisation; photoperiodism.

Unit-V Human Physiology

Chapter-16: Digestion and AbsorptionAlimentary canal and digestive glands, role of digestive enzymes and gastrointestinal hormones; Peristalsis, digestion, absorption and assimilation of proteins, carbohydrates and fats; calorific values of proteins, carbohydrates and fats; egestion; nutritional and digestive disorders – PEM, indigestion, constipation, vomiting, jaundice, diarrhoea.
Chapter-17: Breathing and Exchange of GasesRespiratory 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.
Chapter-18: Body Fluids and CirculationComposition 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.
Chapter-19: Excretory Products and their EliminationModes 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; role of other organs in excretion; disorders – uremia, renal failure, renal calculi, nephritis; dialysis and artificial kidney, kidney transplant.
Chapter-20: Locomotion and MovementTypes 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.
Chapter-21: Neural Control and CoordinationNeuron and nerves; Nervous system in humans – central nervous system; the peripheral nervous system and visceral nervous system; generation and conduction of nerve impulse; reflex action; sensory perception; sense organs; elementary structure and functions of eye and ear
Chapter-22: Chemical Coordination and IntegrationEndocrine 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, goiter, exophthalmic goiter, diabetes, Addison’s disease. Note: Diseases related to all the human physiological systems to be taught in brief.

CBSE Class 11 Biology Practical Syllabus- Marking Evaluation

The CBSE has announced the marking pattern of the Class 11th Biology practical syllabus in the upcoming exam. So that students can be prepared with the syllabus effectively.

Evaluation SchemeMarks
One Major Experiment Part A (Experiment No- 1,3)5
One Minor Experiment Part A (Experiment No- 4,5, 6)4
Slide Preparation Part A (Experiment No- 2)5
Spotting Part B7
Practical Record + Viva VoceCredit to the student’s work over the academic session may be given4
Project Record + Viva Voce5
Total30 Marks

Students looking for the practice sample papers for CBSE Class 11th and class 11 Books can download Free CBSE Sample Papers PDF from the above link. Vidya Setu also provides the CBSE class 11 and class 12 NCERT solutions for biology. After going through the NCERT class 11 biology syllabus, students must also make sure to solve CBSE class 11 sample papers and class 11 marking scheme for better preparation.

CBSE Class 11 Syllabus Biology Practicals

A: List of Experiments

  1. Study and describe three locally available common flowering plants, one from each of the families Solanaceae, Fabaceae, and Liliaceae (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 a number of chambers (floral formulae and floral diagrams). Types of the root (Tap and adventitious); types of the stem (herbaceous and woody); leaf (arrangement, shape, venation, simple and compound).
  2. Preparation and study of T.S. of dicot and monocot roots and stems (primary).
  3. Study of osmosis by potato osmometer.
  4. Study of plasmolysis in epidermal peels (e.g. Rhoeo/lily leaves or flashy scale leaves of onion bulb).
  5. Study of distribution of stomata in the upper and lower surfaces of leaves.
  6. Comparative study of the rates of transpiration in the upper and lower surface of leaves.
  7. Test for the presence of sugar, starch, proteins, and fats in suitable plant and animal materials. 8. Separation of plant pigments through paper chromatography.
  8. Study of the rate of respiration in flower buds/leaf tissue and germinating seeds. 10. Test for the presence of urea urine.
  9. Test for the presence of sugar in the urine.
  10. Test for the presence of albumin in the urine.
  11. Test for the presence of bile salts in urine.

B. Study/Observer of the following (spotting)

  1. Parts of a compound microscope.
  2. 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.
  3. Virtual specimens/slides/models and identifying features of – Amoeba, Hydra, liver fluke, Ascaris, leech, earthworm, prawn, silkworm, honeybee, snail, starfish, shark, rohu, frog, lizard, pigeon and rabbit.
  4. Tissues and diversity in shape and size of plant cells (palisade cells, guard cells, parenchyma, collenchyma, sclerenchyma, xylem, and phloem) through temporary and permanent slides.
  5. Tissues and diversity in shape and size of animal cells (squamous epithelium, smooth, skeletal and cardiac muscle fibers, and mammalian blood smear) through temporary/permanent slides.
  6. Mitosis in onion root tip cells and animal cells (grasshopper) from permanent slides.
  7. Different modifications in roots stem and leaves. 8. Different types of inflorescence (cymose and racemose).
  8. Human skeleton and different types of joints with the help of virtual images/models only.


The Class 11th biology syllabus has been reduced due to the Covid-19 pandemic we all faced, CBSE has reduced the biology course of class 11th by 30%. Every Bio student must note the new syllabus and marking pattern carefully to make aware of how the question paper will be designed and what are the important topics to cover. Follow the Vidya Setu to get the opportunity of learning the syllabus by free online lectures. So you get well prepared even in pandemic times.

FAQs on CBSE Class 11 Syllabus Biology 2021-22.

Q1. Why has CBSE reduced the syllabus?

Due to the Covid-19 Pandemic, the academic schedule for 2021-22 has been delayed. For that students need more time to cover a lot of syllabi stated by the government. So, considering the delayed session, CBSE Class 11 Syllabus Biology has been reduced.

Q2. How much CBSE reduced the Class 11th Biology course?

CBSE reduces the class 11th biology course by 30% for the academic session of 2021-22.

Q3. Is the NCERT biology syllabus of class 11 is going to be reduced in 2021-22?

Yes, the CBSE class 11 biology syllabus has reduced due to the current unavailability of proper resources. The CBSE is also looking forward to reducing the syllabus for the academic year 2021-22.

Q4. Which chapters are deleted biology class 11?

You can find the biology reduced syllabus class 11 as well as the biology deleted portions class 11 above on this page.