WBCHSE Class 11 Biology Syllabus 2020-21

Biology is all about the study of life, its functions, classifications, evolutions and all other living organisms around us. The main concept of studying Biology is to know about ourselves, body parts, nature around us, etc. It is a vast subject which is composed of many branches, including Anatomy, botany, evolution, zoology, etc. WBCHSE Class 11 Biology Syllabus gives an overview of the topics and concepts taught under the subject for the current academic year, so it is the best resource to refer at the start of an academic year. Referring to the syllabus helps to prepare an effective study plan.

Biology is one of the most challenging and mandatory subjects in Science, which requires hard work. WBCHSE Class 11 Biological Sciences Syllabus is well-prepared by the subject experts under the guidance of the State Board of Education which provides adequate knowledge about each essential topic. WBCHSE Class 11 Biological Sciences Syllabus includes- Structure and function of a cell, plant physiology, human physiology, Diversity of living organisms and lot more.

We at BYJU’S provide the syllabus for WBCHSE Class 11 Biological Sciences along with the mark-wise weightage for every chapter so that students can have a good idea about the pattern of the exam.

Download West Bengal Board Class 11 Biological Sciences Syllabus 

The syllabus was reduced for the academic year 2020-21, find below details of the topics deleted.

Unitwise Marking Scheme

Unit Name Marks

Students of Class 11 West Bengal Board can get the detailed syllabus of Biological Sciences from below:


1. Science of life
1.1 Science of Life – Introduction
1.2 Characteristics of life
1.3 Definition and concept of biodiversity*

2. Taxonomy and Systematic
2.1 Taxonomy and Systematics – Definition*
2.2 Taxonomic hierarchy-(Linnaeus) with Example 1
2.3 Bionomical nomenclature

3. Classification of Living Organisms
3.1 What is classification (Definition)*
3.2 Need for classification*
3.3 Five kingdoms of life and the basis of classification of five kingdoms.
3.4 Salient features and classification of Monera, Protoctista (Protista), Fungi and Lichens into major groups.
3.5 Virus and viriods – a brief General account.
3.6 Salient features and classification of plant into major group – Algae, Bryophytes Pteridophytes, Gymnosperms and Angiosperms (three to five salient and distinguishing features of each category and at least two examples of each category*
3.7 Angiosperm – classification upto class, characteristic features (three to five) and examples.
3.8 Salient features and classification of Animals – major non chordata upto phyla And chordatas upto class level (three to five Salient features and at least two examples)
3.9 Tools for study of biodiversity – Museums, Zoos, Botanical Garden & Herberia.*

(* Topics 1.3, 2.1, 3.1,3.2, 3.6,3.9 are deleted for the academic year 2020-21) 


4. Structural Organisation in Plants
4.1 Tissues (Definition)
4.2 Tissues in plants – Meristematic and Permanent (Structure and function)
4.3 Morphology of Root, Stem and leaf (including modifications, microscopic Anatomy and functions)(To be dealt along with relevant practicals)*
4.4 Inflorescenes (Major types – Racemose And Cymose)*
4.5 Morphology of flower (including aestivation And placentation), fruit and seed (one Monocot-Maize and one Dicot-Gram)*
5. Structural Organisation in Animals
5.1 Tissues in animals (structure, occurrence and function in brief).
5.2 Morphology, anatomy and functions of different systems (digestive, circulatory respiratory, nervous and reproductive) of an insect-cockroach.(brief account)*

(* Topics :4.3,4.4,4.5 (fruit and seed), 5.2 are deleted for academic year 2020-21 ) 


6. Cell
6.1 Cell theory and cell as the basic unit of life*
6.2 Cell and its major parts – cell membranes and protoplasm (cytoplasm and nucleus)
6.3 Structure of a prokaryotic and eukaryotic cell (in brief)*
6.4 Structure of plant cell and animal cell (in brief)*
6.5 Cell envelop – cell membrane and cell wall (ultrastructure and function)
6.6 Cell organelles-Ultrastructure and function; Mitochondria, golgi bodies, endoplasmic reticulum, ribosomes, lysomes,vacuoles, plastids, micro bodies (peroxisomes, spherosomes and glyoxysomes)*
6.7 Ultra structure and function of cytoskeleton, Cilia, flagella and centrioles*
6.8 Nucleus- nuclear membrane,nucleoplasm, Chromatin,nucleolus(ultrastructure and function)

7. Chemical constituents of living cell
7.1 Chemical constituents of living cell*
7.2 Biomolecules-structure and function of protein, carbohydrate, lipid and nucleic acid.
7.3 Enzyme-types,properties and enzyme action (lock and key, induced fit model and allosterism)*

8. Cell Division
8.1 Introduction
8.2 Definition and types
8.3 Cell cycle
8.4 Mitosis- Definition and significance (process not required)
8.5 Meiosis- Definition,types,process and Significance
8.6 Difference between mitosis and meiosis

(* Topics 6.1, 6.3, 6.4, 5.6( endoplasmic reticulum, vacubles, plastids, micro bodies ),6.7 (cilia, flagella , centrioles ),7.1, 7.3(enzyme action) are deleted for academic year 2020-21)


9. Movement of Water, Food, Nutrition And Gases
9.1 Introduction
Absorption of water,gases and nutrients.
9.2 Cell to cell transport- diffusion, facilitated diffusion, active transport
9.3 Plant-water relation- imbibitions,water potential,osmosis and plasmolysis*
9.4 Long distance transport-apoplast,symplast, root pressure transpiration pull, Uptake of
mineral ions*
9.5 Transpiration and guttation, opening and
closing of stomata
9.6 Translocation- transport through xylem and phloem, Mass flow hypothesis*

10. Plant Nutrition And Minerals
10.1 Introduction
10.2 Essential minerals-macro and micro nutrients, their roles and deficiency symptoms (in tabular form)
10.3 Mineral toxicity*
10.4 Elementary idea of the Hydroponics
10.5 Nitrogen metabolism-nitrogen cycle, biological nitrogen fixation*

11. Respiration
11.1 Introduction
11.2 Exchange of gases*
11.3 Cellulare respiration-glycolysis, fermentation (anaerobic), T.C.A cycle and E.T.S (aerobic) Definition, process and significance*
11.4 Energy relations-number of A.T.P molecules generated in respiration*
11.5 Amphibolic pathways
11.6 Respiratory quotient of nutrients

12. Photosynthesis
12.1 Introduction-Autotrophic nutrition: photo and chemo-autotrophic, nutritions*
12.2 Definition and the site of Photosynthesis.
12.3 Photosynthetic pigments
(elementary idea-structure not required)
12.4 Photochemical and biosynthetic phases of photosynthesis
12.5 Cyclic and non cyclic photophosphorylation
12.6 Chemo osmotic hypothesis*
12.7 Photo respiration
12.8 C3 and C4 pathways*
12.9 Factors Controlling photosynthesis*

13. Plant Growth And Development
13.1 Introduction
13.2 Phases of plant growth and plant growth rate
13.3 Condition of growth…..(light, temperature, water,hormone,nutrients only)*
13.4 Differentiation, De-differentiation, and Re-differentiation-definition and example only*
13.5 Sequence of developmental process in a plant cell through chart.
13.6 Growth regulations-auxin, gibberellins cytokinin, ethylene, A.B.A
13.7 Seed germination
13.8 Seed dormancy
13.9 Vernalisation*
13.10Photoperiodism-definition, types of plants on the basis of the length of the photoperiod.

(* Topics 9.3,9.4(root pressure transpiration pull , uptake of mineral ions ),9.5, 10.3,10.5, 11.2 , 11.3 (fermentation ( anaerobic) 11.4 ,12.1,12.6,12.8, 12.9,13.3,13 .4, 13 .9 are deleted for academic year 2020-21) 


14. Digestion and Absorption
14.1 Introduction
14.2 Structure (in brief) of human Alimentary canal including dental arrangement and digestive glands
14.3 Role of the digestive enzymes and the G -1 Hormone in digestion.
14.4 Peristalsis
14.5 Digestion, absorption and assimilation of protein, carbohydrate and fat
14.6 [Caloric value of proteins, carbohydrates and fats.] Box item-not to be evaluated*
14.7 Egestion*
14.8 Nutritional and digestive disorders- PEM (protein energy malnutrition,) indigestion, constipation, vomiting, jaundice, diarrhoea*

15. Breathing and Respiration
15.1 Introduction
15.2 Respiratory organs in animals (through chart, recall only)*
15.3 Respiratory system in human (outline)
15.4 Mechanism of breathing and its regulation in human.
15.5 Exchange of gases, transport of gases and regulation of respiration*
15.6 Repertory volumes
15.7 Disorders related to respiration Asthma, emphysema, occupational respiratory disorders- (e.g. Silicosis, Asbestosis)*

16. Body Fluids And Circulation
16.1 Introduction
16.2 Composition of Blood (Tabular form)
16.3 Blood groups, ABO Blood groups
16.4 Coagulation of blood
16.5 Composition of lymph and its function*
16.6 Human circulatory system-(outline idea)*
16.7 Structure of Human heart and blood vessels*
16.8 Cardiac cycle
16.9 Cardiac output (stroke volume and minute volume, determination of cardiac output- Fick’s Principle)
16.10 E.C.G (brief idea, no analysis required)
16.11 Double circulation*
16.12 Regulation of cardiac activity (neutral and hormonal) including factors regulating Blood Pressure*
16.13 Disorders of the circulatory system hypertension, corornary artery disese, angina pectoris, heart failure*

17. Excretory Products And their Elimination
17.1 Introduction
17.2 Modes of excretion- Ammonotelism Ureotelism, Uricotelism (Definition and Examples)
17.3 Human excretory system- structure and function (Histology of nephron)
17.4 Urine formation and Osmo- regulation
17.5 Regulation of Kidney function, Renin, angiotensin, Antidiuretic factor A.D.H and diabetes insipidus*
17.6 Role of other organs in excretion- Liver, skin, lung and salivary gland
17.7 Disorders- Uraemia, renal failure, Renal calculi, Nephritis*
17.8 Dialysis and artificial kidney*

18. Locomotion and Movement
18.1 Introduction- What is locomotion and movement?
18.2 Types of movement ciliary Flagellar and muscular*
18.3 Skeletal muscle-contractile proteins and muscle contraction
18.4 Skeletal system and its function. (To be dealt with relevant portion of practical syllabus)*
18.5 Joints
18.6 Disorders of muscular and skeletal system- Myasthenia gravis, tetany, Muscular dystrophy, arthritis
osteoporosis and gout*

19. Neural control and coordination
19.1 Introduction- what is neural control and co-ordination
19.2 Neurones and nerves (Revisionary)*
19.3 Nervous system in human
19.4 Central Nervous System, Peripheral Nervous System (P.N.S), and visceral Nervous System. Brain and its major partscerebral cortex, thalamus, hypothalamus and lymbic system, mid brain, pons, medulla, cerebellum and Spinal cord ( function only), Mode of distribution and function of P.N.S and autonomic nervous system*
19.5 Generation and Conduction of nerve impulse*
19.6 Reflex action and Reflex Arc
19.7 Sense Organs- sensory perception outline structure and function of eye and ear*

20. Chemical Coordination And Regulation
20.1 Introduction- endocrine glands and hormones.
20.2 Human endocrine system- Hypothalamus, Pituitary, Pineal, Thyroid, Parathyroid, Adrenal,
Pancreas,Gonads (location and function only)
20.3 Mechanism of hormone action (elementary idea)
20.4 Role of hormones as messengers and regulators*
20.5 Hypo and Hyper activity of endocrine glands and related Disorders (common disorders e.g., Dwarfism Acromegaly Cretinism,Goiter, Exopthalmic goiter, Diabetes, Addisons disease*
(Important diseases related to physiology of all Systems of human are to be taught briefly.)

(*topics 14.6,74.7,14.8 ( PEM , indigestion, constipation ),15.2 , 15.5, 15.7 (emphyserma, occupational respiratory disorders ), 16.5 ,16.6, 16.7 , 16.77 ,76.72 , 16.13 ( coronary artery disease , angina pectoris ) ,17.5 ,17 .7( uraernia , renal calculi ) , 17.8 , 18.2,18.4 , 18.6 ( Myasthenia gravistetany, muscular dystrophy ), 19.2, 19.4 | mode of distribution and function of PNS and autonomic nervous system ) , 19.5 , 19.7 , 20.4 ,20.5 | Dwarfism,Acromegaly, Cretinism, Addisons disease are deleted for academic year 2020-21)

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