The CBSE Class 12th Biology Exam is divided into two parts, one is the theory part, which includes 70 marks; on the other hand practical exam carries 30 marks. To secure good marks in the biology exam, you need to do well in the written exam as well as in the practical exam. Before starting the preparation of the biology practical exam, you need to carefully review the NCERT Class 12 Biology Lab Manual 2025-26 PDF.
Class 12 Biology Lab Manual 2025-26 PDF
The NCERT publishes the Biology lab manual for CBSE Class 12 and makes it available online on their official website. The CBSE Class 12 Biology lab manual 2026 is a helpful resource for Class 12 students preparing for the practical examination administered by the Central Board of Secondary Education (CBSE). Throughout the academic year, students need to do practicals in their school laboratory under the supervision of their teacher. Students must complete some practicals and participate in a viva during the practical examination. The CBSE 12th Biology lab manual 2026 provides exercises based on the chapters of the Biology book and includes investigatory tasks.
CBSE Class 12 Biology Practical Exam Marking Scheme
The practical assessment for Class 12 Biology is separated into several stages and carries a different marking scheme. Understanding the class 12 biology practical exam marking scheme also allows students to make a theoretical strategy to approach the examination. Students can view the evaluation criteria and their scores in the table below.
| Evaluation Scheme | Marks | |
| One Major Experiment 5 | 5 | |
| One Minor Experiment 2 & 3 | 4 | |
| Slide Preparation 1 & 4 | 5 | |
| Spotting | 7 | |
| Practical Record + Viva Voce |
(Credit to the student’s work over the academic session may be given.)
|
4 |
| Investigatory Project and its Project Record + Viva Voce | 5 | |
| Total | 30 | |
NCERT Lab Manual Class 12 Biology PDF Free Download
As the CBSE board follows the NCERT curriculum for the Higher Secondary examination, students can download the chapter-wise CBSE Class 12 Biology Lab Manual 2025 26 PDF from the official portal of NCERT or by using the direct link shared below.
| Class 12th Biology Exercises | PDF Download Links |
| Exercise 1 | Click here to Download |
| Exercise 2 & 3 | Click here to Download |
| Exercise 4 & 5 | Click here to Download |
| Exercise 6 | Click here to Download |
| Exercise 7 | Click here to Download |
| Exercise 8 & 9 | Click here to Download |
| Exercise 10 | Click here to Download |
| Exercise 11 | Click here to Download |
| Exercise 12 & 13 | Click here to Download |
| Exercise 14 | Click here to Download |
| Exercise 15 | Click here to Download |
| Exercise 16 to 20 | Click here to Download |
| Exercise 21 | Click here to Download |
| Exercise 22 to 24 | Click here to Download |
| Exercise 25 | Click here to Download |
| Investigatory Project Work | Click here to Download |
Steps for Downloading CBSE Class 12 Biology Lab Manual 2026
- Go to NCERT’s official website, ncert.nic.in.
- The ‘publishing’ area can be found at the top of the menu bar on the home page.
- Students must select ‘Laboratory Manuals’ from a drop-down menu of available selections.
- Click on the choice and then on Class XII.
- The lab guides for the biology course will be available with a click.
- To get the PDF, simply click on each activity.
- Print out the CBSE Class 12th NCERT Biology Lab manual PDF for future reference.
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