CBSE Class 11 Biology Syllabus 2020-21 (Revised): Download PDF

Check revised CBSE Class 11 Biology Syllabus 2020-21 and download it in PDF format.

Created On: May 11, 2020 11:51 IST
Modified On: Dec 3, 2020 12:05 IST
CBSE Class 11 Biology Syllabus: 2019-20
CBSE Class 11 Biology Syllabus: 2019-20

CBSE Class 11 Biology Syllabus 2020-21 (Revised) is available here for download in PDF format. Link to download CBSE Syllabus 2020-21 for Class 11 Biology subject is given at the end of this article. 

With the beginning of the new academic session, CBSE has released the new course structure for Class 11 Biology subject.  In the new CBSE Class 11 Biology syllabus, you will get complete details about topics, subtopics, paper pattern & other important details. CBSE Class 11 Students having Biology as one of their subjects are advised to thoroughly study the new CBSE Class 11 Biology Syllabus & plan their studies accordingly. However, the syllabus was revised later and here we have provided the revised CBSE Class 11 Biology Syllabus 2020-21.

Also Check: Deleted CBSE Class 11 Syllabus 2020-21: Applicable for CBSE Academic Session 2020-21!

CBSE Class 11 Biology Syllabus (Revised): 2020-21





Diversity of Living Organisms




Structural Organization in Plants and Animals




Cell: Structure and Function




Plant Physiology



Human Physiology





Unit-I Diversity of Living Organisms

Chapter-1: The Living World

What is living? Biodiversity; Need for classification; three domains of life; concept of species and taxonomical hierarchy; binomial nomenclature.

Chapter-2: Biological Classification

Five kingdom classification; Salient features and classification of Monera, Protista and Fungi into major groups; Lichens, Viruses and Viroids.

Chapter-3: Plant Kingdom

Salient features and classification of plants into major groups - Algae, Bryophyta, Pteridophyta and Gymnospermae. (salient and distinguishing features and a few examples of each category).

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 distinguishing features of a few examples of each category). (No live animals or specimen should be displayed.)

Unit-II Structural Organization in Animals and Plants

Chapter-5: Morphology of Flowering Plants

Morphology of inflorescence and flower, Description of 01 family: Solanaceae or Liliaceae (to be dealt along with the relevant experiments of the Practical Syllabus).

Chapter-7: Structural Organisation in Animals

Animal tissues.

Unit-III Cell: Structure and Function

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.

Chapter-9: Biomolecules

Chemical  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 Division

Cell cycle, mitosis, meiosis and their significance

Unit-IV Plant Physiology

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.

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.

Chapter-15: Plant - Growth and Development

Growth regulators - auxin, gibberellin, cytokinin, ethylene, ABA.

Unit-V Human Physiology

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.

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.

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; role of other organs in excretion; disorders - uremia, renal failure, renal calculi, nephritis; dialysis and artificial kidney, kidney transplant.

Chapter-20: Locomotion and Movement

Skeletal muscle, contractile proteins and muscle contraction.

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.

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); 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: 2020-21

Time Allowed : Three hours,  Max. Marks: 30  

Evaluation Scheme


One Major Experiment Part A (Experiment No- 1,3)


One Minor Experiment Part A (Experiment No- 4,5,6)


Slide Preparation Part A (Experiment No- 2)


Spotting Part B


Practical Record + Viva Voce

Credit to the students’ work over the academic session may be given


Project Record + Viva Voce




A: List of Experiments

1.   Study and describe a locally available common flowering plant, from any one family: Solanaceae or 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 number of chambers (floral formulae and floral diagrams).

2. Study of distribution of stomata in the upper and lower surfaces of leaves.

3. Separation of plant pigments through paper chromatography.

4. Study of the rate of respiration in flower buds/leaf tissue and germinating seeds.

5. Test for presence of sugar in urine.

6. Test for presence of albumin 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, liverfluke, Ascaris, leech, earthworm, prawn, silkworm, honeybee, snail, starfish, shark, rohu, frog, lizard,  pigeon and rabbit.

4. 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.

5. Mitosis in onion root tip cells and animal cells (grasshopper) from permanent slides.

⇒ Download CBSE Class 11 Biology Syllabus 2020-21 PDF (Revised & Reduced)

Download Old CBSE Class 11 Biology Syllabus 2020-21 PDF (Revised & Reduced)


List of Recommended Books for CBSE Class 11 Biology (With  Links)

• NCERT Textbooks for Class 11 Biology (With Solutions)

• NCERT Exemplar Class 11 Biology

• Pradeep's A Text book of Biology for Class 11

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