Tamil Nadu 12th Biology Deleted Syllabus 2026 Check Chapter Wise Syllabus

Roumik Roy

Updated on - Jun 20, 2025

Table of Contents

What is the Precise Tamil Nadu 12th Biology Deleted Syllabus 2026?
How to Obtain the Tamil Nadu 12th Biology Syllabus 2026 PDF?
What is the Actual Tamil Nadu 12th Biology Question Paper Pattern 2026?
What is the Accurate Tamil Nadu 12th Biology Topics Weightage 2026?
What are the Benefits of the Tamil Nadu 12th Biology Deleted Syllabus 2026?

The Tamil Nadu State Board has made some changes to the Class 12th Biology syllabus. Now, the Tamil Nadu 12th biology Deleted Syllabus will help the students to strengthen their conceptual understanding. Thus, if you are beginning your preparation for the Tamil Nadu 12th Exam 2026, make sure to follow the updated syllabus.

The Tamil Nadu 12th Deleted Syllabus will help you to create a rational study plan. The decision to reduce the Biology syllabus will help in optimizing the curriculum. It will also reduce the academic load. The subject of 12th Biology is divided into Botany and Zoology. Certain topics, sections, and subsections have been removed. The authorities have eliminated unnecessary content in the syllabus so that more attention can be paid to application-based learning. Furthermore, a lot of time will be saved because of the reduced syllabus and this saved time can be used for the preparation of exams like NEET. By understanding the exact Tamil Nadu 12th biology Deleted Syllabus, you can create a proper timetable and realistic academic goals.

This write-up discusses all the central aspects of the Tamil Nadu 12th biology Deleted Syllabus. Hence, you must take some time to analyze the forthcoming details.

What is the Precise Tamil Nadu 12th Biology Deleted Syllabus 2026?

Once you understand the Tamil Nadu 12th biology Deleted Syllabus then it will become very easy to plan a timetable and study plan. The table below shares the chapter-wise deleted topics for Tamil Nadu 12th Biology -

Chapters	Deleted Topics
Human Health and Diseases	Detailed explanations about Typhoid, Pneumonia, Ascariasis, and Filariasis have been cut short
Biotechnology: Principles and Processes	Tools of Recombinant DNA Technology and Bioreactors have been shortened
Organisms and Populations	Growth Models, Population Interactions – Extensive details have been removed
Strategies for Enhancement in Food Production	Animal husbandry (Poultry and Fisheries) – Certain portions have been eradicated
Microbes in Human Welfare	Industrial production of alcoholic beverages, SCP (single cell protein) – Reduced to a certain extent
Reproduction in Organisms	Extensive details have been cut short

Also Read: Tamil Nadu 12th Sample Papers

How to Obtain the Tamil Nadu 12th Biology Syllabus 2026 PDF?

You must always follow only the updated syllabus while preparing for the 12th Class Biology Exam. Following the outdated syllabus will only lead to a waste of time. Here is the updated PDF for the Tamil Nadu 12th Biology Syllabus –

Tamil Nadu 12th Biology Syllabus 2026 – Download PDF

Also Read: Tamil Nadu 12th Admit Card

What is the Actual Tamil Nadu 12th Biology Question Paper Pattern 2026?

The Tamil Nadu 12th Biology question paper will be divided into 2 parts. The first part will be Botany and the second part will be Zoology. Each part will carry 35 marks each. Hence the total weightage of the paper will be 70 marks. The question paper will have a mix of long-answer-type questions, short-answer-type questions, very short-answer-type questions, MCQs, and objective-type questions. In each Botany and Zoology, you will have to answer 8 questions in Section 1 (1 mark each), 4 questions in Section 2 (2 marks each), 3 questions in Section 3 (3 marks each), and 2 questions in Section 4 (5 marks each). The table below will help you to understand the Tamil Nadu 12th Biology question paper pattern easily-

Sections in Part 1 – Botany	Number of Questions	Marks Allotted
1	8 (MCQs and objective-type questions)	8 x 1 = 8
2	4 (very short-answer-type questions)	4 x 2 = 8
3	3 (short-answer-type questions)	3 x 3 = 9
4	2 (long-answer-type questions)	2 x 5 = 10
Total		35 marks
Sections in Part 2 – Zoology	Number of Questions	Marks Allotted
1	8 (MCQs and objective-type questions)	8 x 1 = 8
2	4 (very short-answer-type questions)	4 x 2 = 8
3	3 (short-answer-type questions)	3 x 3 = 9
4	2 (long-answer-type questions)	2 x 5 = 10
Total		35 marks
Aggregate Total of Botany and Zoology		70 marks

Also Read: Tamil Nadu 12th Previous Year Question Papers

What is the Accurate Tamil Nadu 12th Biology Topics Weightage 2026?

If you know the exact weightage for the subject of Biology then it would become very easy to allocate time for each topic. Here is the topic-wise discussion of weightage for the Tamil Nadu 12th Biology -

Topics	Weightage
Botany – Taxonomy of angiosperms, plant anatomy, cell biology and genetics, biotechnology, plant physiology, biology in human welfare, etc.	50%
Zoology – Human physiology, microbiology, immunology, genetics, environmental sciences, evolution theories, etc.	50%

You must comprehend the fact that the percentages mentioned above are rough values based on the findings of the Tamil Nadu 12th Biology syllabus pattern. To gain specific knowledge about the syllabus pattern and weightage, you must visit the designated website of the board at dge.tn.gov.in.

Also Read: Tamil Nadu 12th Exam Preparation Tips

What are the Benefits of the Tamil Nadu 12th Biology Deleted Syllabus 2026?

There are lots of benefits of the Tamil Nadu 12th biology Deleted Syllabus. Some of the vital points have been mentioned below –

The Tamil Nadu 12th biology Deleted Syllabus will help you to create a rational study schedule. You can focus more on strengthening your concepts.
A decreased syllabus means that time will be saved. You can use this saved time to prepare for exams like NEET.
When you are attempting the questions from previous years’ papers, skip the questions from the deleted syllabus.
Your stress level will surely go down because of the reduced syllabus.
The deleted syllabus will increase your chance of scoring better grades.

For more such updates about the Tamil Nadu 12th Exam, follow Getmyuni!