Tamil Nadu Class 12 Biology Syllabus 2024-25: Check TN 12th Botany and Zoology Syllabus

Samia Miraj

Updated On: August 20, 2024 12:10 PM

Tamil Nadu Class 12 Biology Syllabus 2024-25 is divided into two parts: Botany and Zoology. Check the complete syllabus for both the subjects here and also download the PDFs to refer to.
Tamil Nadu Class 12 Biology Syllabus 2024-25
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Tamil Nadu Class 12 Biology Syllabus 2024-25 is divided into two main subjects. Students will be taking separate exams for Zoology and Botany under the Biology subjects in the Tamil Nadu 12th Board 2025 examination. The TN 12th Biology syllabus 2024-25 is divided into zoology and botany, containing various topics under each subject. Units allotted for Botany are Taxonomy of angiosperms, Plant anatomy, Cell biology and genetics, Biotechnology, Plant physiology, and Biology in human welfare. Chapters allotted for Zoology are Human Physiology, Microbiology, Immunology, Genetics, Environmental Sciences, Biology Applications, and Evolution Theories. The TN 12th biology paper has four sections and is conducted for 150 marks. Make sure to complete the Tamil Nadu 12th Syllabus 2024-25 on time and prepare for the board exams accordingly.

The revised TN 12th 2024–25 Biology syllabus will be made available online in PDF format by the Directorate of Government Examinations, Tamil Nadu. It includes the marking scheme, important topics, marks distribution, and necessary instructions to follow while appearing for the TN 12th board exams. Check more information about the Tamil Nadu Class 12 Biology Syllabus 2024-25 here:

Tamil Nadu Class 12 Biology Syllabus 2024-25: PDF

As mentioned above, Tamil Nadu Class 12 Biology Syllabus 2024-25 is divided into two parts. Students can download the PDF for both Botany and Zoology by clicking on the direct links given here:

How To Download Tamil Nadu Class 12 Biology Syllabus 2024-25?

Students can download the different PDFs for the Tamil Nadu Class 12 Biology Syllabus 2024-25 by following the simple steps given below. Make sure to download the syllabus as soon as possible:

  • Step 1: Visit the official website of DGE Tamil Nadu at dge.tn.gov.in
  • Step 2: The homepage will open on your screen where you can get the latest circulars for the board exams.
  • Step 3: Click on the Syllabus option.
  • Step 4: A new page with the list of subjects will appear on the screen. Click on the Botany or Zoology subject to download the syllabus.
Also Check
Tamil Nadu Class 12 Previous Year Question Papers
Tamil Nadu Class 12 Question Paper 2024-25

Tamil Nadu Class 12 Biology Syllabus 2024-25

Students must prepare separately for Botany and Zoology. They can check out the details related to the syllabus for both the subjects from the tables given below:

Botany

Refer to the table given below to learn more about the chapters that will be included in botany and the topics allotted for each chapter:

Unit

Topics

Taxonomy of angiosperms

Type of classification such as artificial, natural, phylogenetic, biosystematics, binomial nomenclature herbarium and their uses classification of plant families such as Malvaceae, Solanaceae, Euphorbiaceae, Liliaceae, and their economic importance

Plant anatomy

Tissue and tissue system anatomy of monocot and dicot root

Anatomy of monocot and dicot stem

Anatomy of dicot leaf

Cell biology and genetics

Chromosome structure and types

Genes and genomes linkage and crossing over gene mapping recombination of chromosomes mutation and

Chromosome aberrations DNA as a genetic material its structure and replication of DNA

Structure of RNA and its type

Biotechnology

Recombinant DNA technology, transgenic plants and microbes, plant tissue culture and its application, protoplast fusion, SCP

Plant physiology

Photosynthesis its significance and photochemical reactions, electron transport system, photorespiration

Factors affecting photosynthesis mode of nutrition

Chemosynthesis respiration, glycolysis, Krebs cycle aerobic respiration and anaerobic respiration

Fermentation

Plant growth regulators phytohormones such as auxins, gibberellins, cytokinin, ethylene, ABA. photoperiodism and vernalization

Biology in human welfare

Food production

Important varieties

Role of biofertilizers

Crop diseases and their control

Biopesticides

Genetically modified organisms

Bio war

Biopiracy

Biopatent

Sustainable agriculture medicinal plants including microbes economic importance of crops.

Zoology

Students can check out the details related to the chapters included in the Zoology subject from the table given below:

Unit

Topics

Human physiology

Nutrition- carbohydrates, proteins, lipids, balanced diet, malnutrition, digestive enzymes, illness to human bodies

Bones and joints- muscles

Respiration-breathing, Circulation-including heart functioning, myocardial infarction, atherosclerosis, ECG, heart valves, blood pressure, heart transplantationPlasma- corpuscles, anticoagulants Coordinating system- including brain functioning, memory, diseases, spinal cord functioning, reflex action

Chemical coordination- thyroid, parathyroid, insulin, hormones of the adrenal cortex and medulla, reproductive hormones

Receptor organs -including eyes, ears, skin, tongue excretion kidney Reproductive system- spermatogenesis and oogenesis menstrual cycle, in vitro fertilization, birth control, STD, and AIDS.

Microbiology

Introduction

Influence of Louis Pasteur, koch

Virology genetics

AIDS and its control

bacteriology, protozoan microbiology, and larval microbiology

Pathogenicity of microorganisms.

Immunology

Immune system-

Innate immunity- lymphoid cells, mononuclear phagocytes, cytokines, structure of antibody, antigen-antibody reaction

Acquired immunity- development of the immune system, T-cell activation, monoclonal body, cytotoxicity, infections and immunity, immunity and tissue transplantation, immune-related disease.

Genetics

Human genome project, genetic disease, karyotyping

Recombinant DNA technology, cloning, transgenic organisms, genetically modified organisms, gene therapy, bioinformatics, DNA sequencing, protein sequencing, protein structure, database.

Environmental Sciences

Human population, global warming, ozone layer depletion, waste management, biodiversity conservation, energy crisis, environmental impact, Poverty.

Biology applications

Livestock and Management, milch breed, draught breed, common diseases and control, poultry farming, pisciculture, urine analysis, CT scan, artificial pacemaker.

Evolution theories

Lamarkism, Darwinism, the modern concept of natural selection, species concept, the origin of species, and isolating mechanisms.

Tamil Nadu Class 12 Biology Marking Scheme 2025

The TN 12th Biology exam is conducted for 150 marks, and students must complete the paper within 3 hours.  The biology exam paper consists of short, long, and objective questions. The marking scheme for the TN 12th biology exam is given below.

Sections Type of Question Total Questions Marks
A Objective 30 30
B Very short 20 45
C Short 12 35
D Long 8 40
Total 150

The syllabus helps the students to learn about the essential chapters, marking criteria, and types of questions asked. For all the information students may check this page!

FAQs

Is the latest Tamil Nadu Class 12 Biology Syllabus 2023-24 released?

No, Tamil Nadu Class 12 Biology Syllabus 2023-24 is not yet available on the official website of DGE Tamil Nadu. Students can still check out the information related to the basic chapters that can appear in the board exams by downloading the PDF shared above.

Will there be two papers in Tamil Nadu Class 12 Biology?

Yes, there will be two papers in Tamil Nadu Class 12 Biology. Students will have to appear separately for Botany and Zoology. The syllabus is also separately specified on the official website to be downloaded in a PDF format.

What is the most important chapter in the Tamil Nadu Class 12 Biology Syllabus 2023-24?

Tamil Nadu Class 12 Biology Syllabus 2023-24 is divided into two main subjects i.e. Zoology and Botany. Chapters allotted for Botany are Taxonomy of Angiosperms, Plant Anatomy, Cell Biology and Genetics, Biotechnology, Plant Physiology, and Biology in Human Welfare. Chapters allotted for Zoology are Human Physiology, Microbiology, Immunology, Genetics, Environmental Sciences, Biology Applications, and Evolution Theories.

How to score full marks in Tamil Nadu Class 12 Biology Paper 2023-24?

For the Tamil Nadu Class 12 Biology Paper 2023-24, it is important to have a thorough understanding of all the concepts, theories, and principles in the syllabus. Make sure to study from your textbooks and reference books, and practice solving previous year's papers and sample papers. Additionally, create a study schedule that gives you enough time to revise and practice all the topics.

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