Biology is one of the most important & scoring subjects when preparing for your exams. Biology is a field of science that helps us understand the living world and the way species function and evolve.
CBSE Class 11 Biology syllabus 2022-23 has been released on the official website and students can download the full syllabus from there in pdf format. Here, in this article, we have included all the units with summary and mark distribution.
CBSE Biology Class 11 Syllabus 2022-23: Mark Distribution
Given below is the CBSE Class 11 Biology Syllabus 2023 and the marks distribution of each unit.
|Unit 1: Diversity of Living Organisms||15|
|Unit 2: Structural Organization in Plants and Animals||10|
|Unit 3: Cell: Structure and Function||15|
|Unit 4: Plant Physiology||12|
|Unit 5: Human Physiology||18|
CBSE Biology Class 11 Syllabus 2022-23:
Given below is the evaluation scheme of practical exams:
|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|
Unit-I Diversity of Living Organisms
Chapter 1: The Living World
Biodiversity; Need for classification; three domains of life; taxonomy and systematics; the 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
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)
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 specimen should be displayed.)
Unit-II Structural Organization in Animals and Plant
Chapter 5: Morphology of Flowering Plants
Morphology of different parts of flowering plants: root, stem, leaf, inflorescence, flower, fruit and seed. Description of family Solanaceae
Chapter 6: Anatomy of Flowering Plants
Anatomy and functions of tissue systems in dicots and monocots.
Chapter 7: Structural Organisation in Animals
Morphology, Anatomy and functions of different systems (digestive, circulatory,respiratory, nervous and reproductive) of frog.
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.
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)
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
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;
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
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.
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 goitre, diabetes, Addison’s disease. Note: Diseases related to all the human physiological systems to be taught in brief.
CBSE Class 11 Biology Syllabus: Prescribed Books
Here we have given the reference books for CBSE Class 11 Biology Syllabus 2023.
- Biology Class-XI, Published by NCERT
- Other related books and manuals brought out by NCERT
- NCERT Solutions for Class 11 Biology by Aakash
1. Will CBSE conduct CBSE Class 11 Exam 2023 annually?
Yes, from this year CBSE will be conducting exams annually and there will be no term 1 and term 2. Students will be tested on the complete syllabus.
2. Where I can get CBSE Class 11 Biology Syllabus 2023?
You can get CBSE Class 11 Biology detailed Syllabus 2023 from this page. To get the syllabus of other subjects the students can visit the CBSE official website or Aakash Blog.
3. How many units are there in CBSE Class 11 Biology Syllabus 2023?
CBSE Class 11 Biology Syllabus 2023 consists of 5 units. The units of CBSE Class 11 Biology Syllabus 2023 are Diversity of Living Organisms, Structural Organization in Plants and Animals, Cell: Structure and Function, Plant Physiology, and Human Physiology.
4. Is class 11 Biology hard?
Many students choose Biology because they believe that it is an engaging and scoring subject. However, after students examine the extensive curriculum for class 11, they know that getting decent grades in this subject would take some hard work and dedication.
5. Is there any reduction in syllabus of class 11 CBSE 2022 23?
CBSE class 11 syllabus is reduced for the session 2022-23. The board has given the list of deleted topics in the CBSE syllabus for class 11 Physics, Chemistry, Mathematics, Biology, Accountancy, Business Studies, History, Geography, and other subjects. Students can refer to the official website for complete details.
6. Which is the toughest chapter in biology class 11?
The chapters related to cells and cell division are most difficult as students feel that there are many difficult concepts like miosis and mitosis, and the differences between them. But, again if students are thorough with their preparation and practice previous year question papers then nothing is difficult to be achieved.