As per the stream chosen in class 11th, the students will have to continue with the subjects. The syllabus details for all the subjects are mentioned in the PDF file. It will be necessary for students to study 5 subjects. In addition, they can choose 2 more subjects as additional subjects. The exam for some subjects will be of 70 marks and some subjects will be of 80 marks. By visiting the official website of the board, students can check the syllabus for their subjects. They can download the syllabus PDFs and prepare for the board exams. For complete details about the CHSE Odisha Syllabus 2025-26 and download the PDFs, go through the article in detail.
DownloadCHSE Odisha Class 12th Biology Syllabus 2025-26 here
CHSE Odisha 12th Biology Syllabus 2025-26
Below given is the detailed syllabus:
Unit | Chapter | Topics / Subtopics |
Unit I: Diversity of Living Organisms | 1. The Living World (Botany) | Biodiversity; Need for classification; Three domains of life; Taxonomy & systematics; Concept of species; Taxonomical hierarchy; Binomial nomenclature. |
2. Biological Classification (Botany) | Five kingdom classification; Salient features of Monera, Protista, Fungi; Lichens; Viruses & Viroids. | |
3. Plant Kingdom (Botany) | Classification of plants into major groups; Features & examples of Algae, Bryophyta, Pteridophyta, Gymnospermae. (Excluded: Angiosperms, Plant Life Cycle, Alternation of Generations) | |
4. Animal Kingdom (Zoology) | Classification: Non-chordates up to phyla; Chordates up to class level; Salient features & examples. (No live animals/specimens to be displayed) | |
Unit II: Structural Organisation in Plants & Animals | 5. Morphology of Flowering Plants (Botany) | Morphology of root, stem, leaf, inflorescence, flower, fruit & seed; Description of family Solanaceae. |
6. Anatomy of Flowering Plants (Botany) | Anatomy & functions of tissue systems in dicots & monocots. | |
7. Structural Organisation in Animals (Zoology) | Morphology, anatomy & functions of digestive, circulatory, respiratory, nervous & reproductive systems of frog. | |
Unit III: Cell – Structure & Function | 8. Cell: The Unit of Life (Botany) | Cell theory; Prokaryotic & eukaryotic cell structure; Plant vs animal cell; Cell envelope, membrane, wall; Cell organelles (ER, Golgi, lysosomes, vacuoles, mitochondria, ribosomes, plastids, microbodies, cytoskeleton, cilia, flagella, centrioles); Nucleus. |
9. Biomolecules (Botany) | Chemical constituents: Proteins, carbohydrates, lipids, nucleic acids; Enzymes – types, properties, mechanism. (Excluded: Nature of bonds in polymers; Concept of metabolism; Dynamic state of body constituents; Living state) | |
10. Cell Cycle & Cell Division (Zoology) | Cell cycle; Mitosis; Meiosis; Significance. | |
Unit IV: Plant Physiology | 11. Photosynthesis in Higher Plants (Botany) | Photosynthesis; Site, pigments; Photochemical & biosynthetic phases; Cyclic & non-cyclic photophosphorylation; Chemiosmosis; Photorespiration; C3 & C4 pathways; Factors affecting photosynthesis. |
12. Respiration in Plants (Botany) | Gas exchange; Glycolysis; Fermentation; TCA cycle; Electron transport system; ATP yield; Amphibolic pathways; Respiratory quotient. | |
13. Plant Growth & Development (Botany) | Seed germination; Phases & conditions of growth; Differentiation, dedifferentiation, redifferentiation; Developmental processes; Plant growth regulators – auxin, gibberellin, cytokinin, ethylene, ABA. | |
Unit V: Human Physiology | 14. Breathing & Exchange of Gases (Zoology) | Respiratory organs; Human respiratory system; Breathing mechanism; Regulation; Gas exchange & transport; Respiratory volumes; Disorders – asthma, emphysema, occupational respiratory diseases. |
15. Body Fluids & Circulation (Zoology) | Blood composition, groups, coagulation; Lymph; Human circulatory system (heart, vessels); Cardiac cycle & output; ECG; Double circulation; Regulation; Disorders – hypertension, CAD, angina, heart failure. | |
16. Excretory Products & Elimination (Zoology) | Modes of excretion (ammonotelism, ureotelism, uricotelism); Human excretory system; Urine formation & osmoregulation; Kidney regulation (RAAS, ANF, ADH, diabetes insipidus); Excretory disorders (uremia, renal failure, stones, nephritis); Dialysis, kidney transplant. | |
17. Locomotion & Movement (Zoology) | Types (ciliary, flagellar, muscular); Skeletal muscles, contractile proteins, contraction; Skeletal system & joints; Disorders – myasthenia gravis, tetany, dystrophy, arthritis, osteoporosis, gout. | |
18. Neural Control & Coordination (Zoology) | Neuron & nerves; Human nervous system (CNS, PNS, ANS); Nerve impulse generation & conduction. | |
19. Chemical Coordination & Integration (Zoology) | Endocrine glands & hormones; Human endocrine system (hypothalamus, pituitary, pineal, thyroid, parathyroid, adrenal, pancreas, gonads); Mechanism of hormone action (basic idea); Hypo-/hyperactivity disorders – dwarfism, acromegaly, cretinism, goiter, exophthalmic goiter, diabetes, Addison’s disease. |
Odisha CHSE Class 12 Biology Syllabus 2025-26: Steps to Download
To get the Odisha 12th syllabus, students can follow the steps provided below.
Step 1: Visit the official website of the Odisha Board at chseodisha.nic.in.
Step 2: Click on the 'Odisha Board syllabus' link on their home page.
Step 3: Now choose the 12th class from the drop-down menu.
Step 4: The Odisha 12th syllabus will now open in a separate window on the website.
Step 5: Take a printout of the CHSE Odisha class 12 curriculum for 2025-26 to refer to during your exams.
