CBSE Biology Practicals Class 12

CBSE Class 12 Practical Biology helps students to do experiments and learn the various concepts of Biology. Furthermore, the syllabus for the CBSE practical exam for Class 12 Biology introduces concepts that are likely to be taught in professional courses such as MBBS and BDS. The Biology Practical CBSE Class 12 experiments are given here to help students prepare for the board exams in a better way. Most experiments presented here have content explaining the basis of the experiment.

Moreover, by clicking on the list of CBSE Class 12 Biology practical experiments mentioned below,  students can access the elaborate and exact steps, processes, procedures and precautions. To download the CBSE Syllabus for Class 12 Biology Practicals, click on the link below.

Download CBSE Class 12 Biology Practical Syllabus PDF 2023-24

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CBSE Class 12 Biology Practical Evaluation Scheme

Below you will find the CBSE Class 12 Biology practical evaluation scheme for students.

Topics Marks
One Major Experiment 5 5
One Minor Experiment 2 & 3 4
Slide Preparation 1& 4 5
Spotting 7
Practical Record + Viva Voce 4
Investigatory Project and its
Project Record + Viva Voce
Total 30

CBSE Class 12 Biology Practical Experiments

Below you will find the list of experiments for Biology practicals.

A. List of experiments
1. Prepare a temporary mount to observe pollen germination.
2. Study the plant population density by quadrat method.
3. Study the plant population frequency by quadrat method.
4. Prepare a temporary mount of the onion root tip to study mitosis.
5. Isolate DNA from available plant material such as spinach, green pea seeds, papaya, etc.
B. Study and observe the following (Spotting)
1. Flowers adapted to pollination by different agencies (wind, insects, birds).
2. Pollen germination on stigma through a permanent slide or scanning electron micrograph.
3. Identification of stages of gamete development, i.e., T.S. of testis and T.S. of ovary through permanent slides (from grasshopper/mice).
4. Meiosis in onion bud cells or grasshopper testis through permanent slides.
5. T.S. of blastula through permanent slides (Mammalian).
6. Mendelian inheritance using seeds of different colours/sizes of any plant.
7. Prepared pedigree charts of any one of the genetic traits such as rolling of tongue, blood groups, ear lobes, widow’s peak and colour blindness.
8. Controlled pollination – emasculation, tagging and bagging.
9. Common disease-causing organisms like Ascaris, Entamoeba, Plasmodium, and any fungus causing ringworm through permanent slides, models or virtual images or specimens. Comment on symptoms of diseases that they cause.
10. Models specimen showing symbolic association in root modules of leguminous plants, Cuscuta on host and lichens.
11. Flashcard models showing examples of homologous and analogous organs.

The practical exam for CBSE Class 12 Biology is composed of 30 marks. Students should try to score well in the practical exam as it can improve their overall score in the board examination. Students must have a thorough knowledge of the theoretical concepts before performing the experiments. This would help them to understand the fundamental concepts more efficiently.

Explore more concepts in Biology to excel in board exams. Also, register at BYJU’S to access the latest CBSE notification, CBSE syllabus, sample papers, marking scheme and more.


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