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CBSE Biology Class 11

CBSE CLASS 11: AN OVERVIEW

 

CBSE Class 11 is a crucial year for students because it sets the foundation for all the important topics that will be covered not only in class 12 but in further studies too. It is important to study sincerely in Class 11 not only for the CBSE Board exams but also for the competitive exams that will ensure entry into a good college. Students should utilize the Class 11 academic year to build their basics, doing so will help them to face the board exam confidently next year.

 

BIOLOGY
COURSE STRUCTURE
CLASS XI (2021 – 22)

 

Evaluation Scheme

Theory

Units

Term-I

Marks

I

Diversity of Living Organisms: Chapter -1,2,3 and 4

15

II

Structural Organization in Plants and Animals: Chapter-5 and 7

08

III

Cell: Structure and Function: Chapter – 8 and 9

12

Units

Term-II

Marks

III

Cell: Structure and Function: Chapter – 10

05

IV

Plant Physiology: Chapter  and 15

12

V

Human Physiology: Chapter -17, 18, 19, 20, 21 and 22

18

Total Theory (Term – I and Term – II)

70

Practical’s Term – I

15

Practical’s Term – II

15

Total

100

 

THEORY

 

Term – I

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 classifications; 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, Pteridophyte 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 Organization 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.

 

Term – II

Unit-III Cell: Structure and Function

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.

 

PRACTICALS

Max. Marks: 15 for each Term

Evaluation Scheme

 

TERM-I

TERM-II

MARKS

Part A

One Major Experiment

 

Experiment No.- 1

 

Experiment No.- 3, 4

 

4

One Minor Experiment

 

Experiment No.- 2

 

Experiment No.- 5, 6, 7

 

3

Part B

Spotting (3 Spots of 1 mark each)

 

B.1, 2, 3

 

B.4, 5

 

3

 

Practical Record + Investigatory Project& Record + Viva Voce

 

5

Total

15

Practicals should be conducted alongside the concepts taught in theory classes.

 

 

A: List of Experiments

 

TERM-I:

  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 osmosis by Potato osmometer.

 

TERM-II:

  1. Separation of plant pigments through paper chromatography.
  2. Study of distribution of stomata in the upper and lower surfaces of leaves.
  3. Study of the rate of respiration in flower buds/leaf tissue and germinating seeds.
  4. Test for presence of sugar in urine.
  5. Test for presence of albumin in urine.

 

  1. Study/Observation of the following (spotting):

 

TERM – I:

B.1 Parts of a compound microscope.

B.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.

B.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.

 

TERM-II :

B.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.

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

 

NCERT Solutions For Biology Class 11

The CBSE course structure is designed in a manner to ensure that students do not go through a lot of pressure, moreover, books are made interactive and interesting for students to enjoy their studies. A lot of fun activities are included in between the chapters to help students learn in a playful way. It makes the process of conveying knowledge to the students efficient and healthy. 

Important Questions For Biology Class 11

The CBSE course structure is designed in a manner to ensure that students do not go through a lot of pressure, moreover, books are made interactive and interesting for students to enjoy their studies. A lot of fun activities are included in between the chapters to help students learn in a playful way. It makes the process of conveying knowledge to the students efficient and healthy. 

CBSE Class 11 Videos

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