CBSE Class 11 Biology Revision Notes with Question Answers

Unit–I Diversity of Living Organisms

Chapter–1 : The Living World
What is living ? Biodiversity; Need for for classi cation; three domains of life : taxonomy and systematics; concept of species and taxonomic hierarchy; binomial nomenclature; tools for study of taxonomy-museum, zoological parks, herbaria, botanical gardens.

CBSE Class 11 Biology Revision Notes Chapter 1 – The Living World

Chapter–2 : Biological Classification
Five kingdom classification; Salient features and classification of Monera,Protista and Fungi into major groups; Lichens,Viruses and Viroids.

CBSE Class 11 Biology Revision Notes Chapter 2 – Biological Classification

Chapter–3 : Plant Kingdom
Salient features and classification of plants into major groups – Algae, Bryophyta, Pteridophyta, Gymnosperms and Angiosperms (three to ve salient and distinguishing features and at least two examples of each category); Angiosperms –classification upto class , characteristic features and examples.

CBSE Class 11 Biology Revision Notes Chapter 3 – Plant Kingdom

Chapter–4 : Animal Kingdom
Salient features and classification of animals non-chordates up to phyla level and chordates up to class level (three to five salient features and at least two examples of each category).

CBSE Class 11 Biology Revision Notes Chapter 4 – Animal Kingdom

Unit–II Structural Organisation in Animals and Plants

Chapter–5 : Morphology of Flowering Plants
Morphology and modifications : Tissues

CBSE Class 11 Biology Revision Notes Chapter 5 – Anatomy of Flowering Plants

Chapter–6 : Anatomy of Flowering Plants
Anatomy and functions of different parts of flowering plants : root, stem, leaf, inflorescence, flower, fruit and seed (to be dealt along with the relevant experiment of the Practical Syllabus).

CBSE Class 11 Biology Revision Notes Chapter 6 – Morphology of Flowering Plants

Chapter–7 : Structural Organisation in Animals
Animal tissues : Morphology, anatomy and functions of different systems (digestive, circulatory, respiratory, nervous and reproductive) of an insect (cockroach), (a brief account only)

CBSE Class 11 Biology Revision Notes Chapter 7 – Structural Organisation in Animals

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, agella, centrioles (ultrastructure and function); nucleus, nuclear membrane, chromatin, nucleolus.

CBSE Class 11 Biology Revision Notes Chapter 8 – Cell The Unit of Life

Chapter–9 : Biomolecules
Chemical constituents of living cells : biomolecules, structure and function of proteins, carbohydrates, lipids, nucleic acids, enzymes, types, properties, enzymes action.

CBSE Class 11 Biology Revision Notes Chapter 9 – Biomolecules

Chapter–10 : Cell Cycle and Cell Division
Cell cycle, mitosis, meiosis and their significance.

CBSE Class 11 Biology Revision Notes Chapter 10 – Cell Cycle and Cell Division

Unit–IV Plant Physiology

Chapter–11 : Transport in Plants
Movement 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; diffusion of gases.

CBSE Class 11 Biology Revision Notes Chapter 11 – Transport in Plants

Chapter–12 : Mineral Nutrition
Essential 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 Plants                                                                                             
Photosynthesis as a mean 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.

CBSE Class 11 Biology Revision Notes Chapter 13 – Photosynthesis in Higher Plants

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; amphibiotic pathways; respiratory quotient.

CBSE Class 11 Biology Revision Notes Chapter 14 – Respiration in Higher Plants

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; seed dormancy; vernalisation; photoperiodism.

CBSE Class 11 Biology Revision Notes Chapter 15 – Plant Growth and Development

Unit–V Human Physiology

Chapter–16 : Digestion and Absorption
Alimentary canal and digestive glands, role of digestive enzymes and gastrointestinal hormones; Peristalsis, digestion, absorption and assimilation of proteins, carbohydrates and fats; caloric values of proteins, carbohydrates and fats; egestion; nutritional and digestive disorders–PEM, indigestion, constipation, vomiting, jaundice, diarrhoea.

CBSE Class 11 Biology Revision Notes Chapter 16 – Digestion and Absorption

Chapter–17 : Breathing and Exchange of Gases
Respiratory organs in animals (recall only); Respiratory system in human; 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.

CBSE Class 11 Biology Revision Notes Chapter 17 – Breathing and Exchange of Gases

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 sy em–hypertension, coronary artery disease, angina pectoris, heart failure.

CBSE Class 11 Biology Revision Notes Chapter 18 – Body Fluids and Circulation

Chapter–19 : Excretory Products and Their Elimination
Modes of excretion–ammonotelism, ureotelism, uricotelism; human excretory system– structure and function; urine formation, osmoregulation of kidney function– renin–angiotensin, atrial natriuretic factor, ADH and diabetes insipidus; role of other organs in excretion;’ disorders– uraemia, renal failure, calculi, nephritis; dialysis and artificial kidney.

CBSE Class 11 Biology Revision Notes Chapter 19 – Excretory Products and Their Elimination

Chapter–20 : Locomotion and Movement
Types of movement–Ciliary, agellar, muscular; skeletal muscle–contractile proteins and muscle contraction; skeletal system and its functions; joints; disorders of muscular and skeletal system–myasthenia gravis, tetany, muscular dystrophy, arthritis, osteoporosis, gout.

CBSE Class 11 Biology Revision Notes Chapter 20 – Locomotion and Movement

Chapter–21 : Neural Control and Coordination
Neuron and nerves;Nervous sy em in humans–central nervous system; peripheral nervous system and visceral nervous sy em; generation and conduction of nerve impulse; reflex action; sensory perception sense organs;elementary structure and functions of eye and ear.

CBSE Class 11 Biology Revision Notes Chapter 21 – Neural Control and Coordination

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.

CBSE Class 11 Biology Revision Notes Chapter 22 – Chemical Coordination and Integration