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CBSE Revised Syllabus for Class 11 Biology 2024-25

Last updated date: 09th Apr 2024
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CBSE Class 11 Biology Syllabus - Free PDF Download

CBSE has announced the new course structure for Class 11 Biology at the start of the academic year 2024-25. The latest CBSE Class 11 Biology syllabus for NCERT textbooks contains comprehensive information about unit-wise segregation of topics, weightage of marks, etc. Class 11 syllabus will not only help students with the exam preparations but also will help them to prepare for NEET. Hence, students need to have clarity over the newly updated Biology syllabus. Vedantu provides the CBSE Syllabus for Class 11 Biology for the academic year 2024-25  for the reference of students. You can download the CBSE Syllabus for Class 11 Biology PDF for free at Vedantu. Get an idea about “How do I finish the class 11 biology syllabus in 1 month?

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CBSE Class 11 Biology Revised Syllabus 2024-25


Unit Name



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 Biodiversity

Need for classification; three domains of life; taxonomy and systematics; 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

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)

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.

FAQs on CBSE Revised Syllabus for Class 11 Biology 2024-25

1. What are the Different Units From the Class 11 Biology Syllabus 2024-25?

There are five different chapters present in the Biology syllabus for Class 11. They are, i) Diversity of Living Organisms, ii) Structural Organization in Plants and Animals, iii) Cell: Structure and Function, iv) Plant Physiology, and v) Human Physiology. The last two chapters hold more weightage in the exams than the former three. Moreover, the syllabus is divided into theory and practical sections. You can find the complete syllabus on Vedantu along with Sample question papers for the same which will surely help you with the preparation.

2. What is Included in the Practical Part of the CBSE Syllabus for Class 11 Biology?

Students need to prepare files for major and minor experiments. Also, they need to prepare slides and perform spotting for part B. One needs to pay extra attention to spotting as it carries the most marks. They will also need to maintain practical and project records of their work. A viva-voice decides their final marks. Experiments of choice in the Class 11 CBSE Biology syllabus depend on the school. Thus, the practical part carries a significant weightage for examination point of view and one should be ready with thorough knowledge of the theoretical part of the respective subject.

3. What is Covered in the Digestion and Absorption Section Under Human Physiology?

This section Term (1 & 2) 2024-25 syllabus PDF, students will get to learn about the human digestive tract in detail. Moreover, one needs to go deep into the problems that might disrupt the usual process of digestion. Pupils should pay key attention to all different enzymes and gastrointestinal hormones as well as the macronutrients needed for sustaining a human body. Vedantu provides extensive study materials covering all aspects of Human Physiology present in the syllabus of Class 11 Biology.

4. How many marks does Term 1 and Term 2 carry in CBSE Syllabus for Class 11 Biology 2024-25 respectively?

As per the CBSE Syllabus for Class 11 Biology Term (1 & 2) 2024-25, each of the terms carry equal weightage of 35 marks each. This makes a total of 70 marks in Total theory which a student scores during their term exams. Additional exam called Practical exam carries 30 marks which makes a total of 100 marks for Biology for class 11. Please refer to CBSE Syllabus for Class 11 Biology Term (1 & 2) 2024-25 on Vedantu for more detailed information about weightage of theory and practical examination along with a detailed explanation of each chapter.

5. Is there a provision for visually impared students during the practical examination?

Yes. Students who are visually impared needing special needs are taken care of by CBSE. There is a separate evaluation scheme for 15 marks in each term. There are a total of 15 marks separated in 3 parts: Identification/ familiarity with apparatus carry 5 marks, Written test (based on given/ prescribed practicals) will be awarded 5 marks and Practical records and viva combined will be awarded 5 marks. Students should refer to the syllabus for biology to get the idea about the respective topics.