CBSE 12th Biology Marking Scheme 2021 Blueprint/Mark Distribution

CBSE class 12th Biology Blueprint 2020-21, Download Class 12th Biology Marking scheme 2020-21, Class 12th Biology Chapter-wise Mark Distribution, Download Class 12th Latest Biology Blueprint 2020-21 : For all the students who are looking for updates on the latest class 12th biology blueprint and marking scheme that have been implemented along in the revised Class 12th Syllabus by Central Board of Secondary Education in the curriculum for the academic session 2020-21 can check out all the relevant details in this article. If you are a CBSE Class 12th student who’s preparing for the board examination next year then you must familiarize yourself with the new exam pattern in order to score well in your final examination. Here we are going to enlighten you with latest class 12 biology exam pattern 2020-21, chapter-wise marks distribution and question paper design.

If you are looking for information on what changes CBSE has implemented in class 12th biology marking scheme 2020-21 then you must read this article carefully. Along with blueprint class 12th biology we have also provided details on the chapters that have reduced from the Syllabus /curriculum. Students can also download the blueprint/marking scheme from the direct link that is provided below for their assistance. Just click on the given link and begin your preparations of your board exams in the best way.

CBSE 12th Biology Marking Scheme 2021 Blueprint/Mark Distribution

Students are well aware that CBSE have reduced 30% of the syllabus and have released the biology class 12 blueprint/marking scheme 2020-21 on its official website. This step was taken to ensure that children are able to perform their best in the examination as during the nation wide lockdown they were not able to attend the regular classes which eventually have effected their studies. The updated curriculum focuses on understanding and application of scientific principles, while ensuring that ample opportunities and scope for learning and appreciating basic concepts continue to be available within its framework. Here is the over-view of this article :

Article Category – Class 12th Biology Syllabus 2020-21

Exam Conducting Body – Central Board of Secondary Education (CBSE)

Class – 12th (Sr.Secondary)

Subject – Biology

Year – 2020-21

Official Website – cbse.nic.in

CBSE Class 12th Biology Unit -Wise Marks Distribution

If you aim to score well in your board exams then have first you must analyse your cbse class 12th bilogy syllabus thoroughly. The next thing that is quite important is to understand the exam pattern very well and have a tight grasp over the question paper design. Once you have a clear idea of cbse class 12 biology mark distribution 2020-21 you can focus on the chapters that carry high weightage first and practice them enough to get high marks.

Also Check out : CBSE Class 12th Biology Syllabus 2021 Board Exam Check All Topics

CBSE Class 12th Biology Sample Paper/Question Paper For Download PDF

CBSE Class 12th Science Changed Exam Pattern/Syllabus 2021 

Here we have discussed the marks distribution of class 12th biology subject for the academic session 2020-21. Since a lot of changes have been implemented in the syllabus it is necessary to keep yourself posted with latest updates. Check out the details of the following from below.

UNIT TITLE  MARKS
VI Reproduction 14
VII Genetics and Evolution 18
VIII Biology and Human Welfare 14
IX Biotechnology and its Applications 12
X Ecology and Environment 12
TOTAL 70

CBSE 12 Biology Practical Marks

Biology is considered to be a scoring subject and the reason behind is that students have 30 marks of practical in which they can score really well. This eventually helps in improving their overall grade in class 12th biology subject. But one must also understand that the practical marks are also divided in various topics. A student have to perform number of experiments and then study/observe some of the experiments. Details of the practical mark distribution is provided below.


A. List of Experiments
1. Prepare a temporary mount to observe pollen germination.
2. Collect and study soil from at least two different sites and study them for texture, moisture
content, pH and water holding capacity. Correlate with the kinds of plants found in them.
3. Collect water from two different water bodies around you and study them for pH, clarity and
presence of any living organism.
4. Prepare a temporary mount of onion root tip to study mitosis.
5. Study the effect of different temperatures or three different pH on the activity of salivary
amylase on starch.
6. Isolate DNA from available plant material such as spinach, green pea seeds, papaya, etc.

B. Study/observation of the following (Spotting)
1. Flowers adapted to pollination by different agencies (wind, insects, birds).
2. Identification of stages of gamete development, i.e., T.S. of testis and T.S. of ovary through
permanent slides (from grasshopper/mice).
3. Meiosis in onion bud cell or grasshopper testis through permanent slides.
4. T.S. of blastula through permanent slides (Mammalian).
5. 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.
6. Common disease causing organisms like Ascaris, Entamoeba, Plasmodium, any fungus
causing ringworm through permanent slides, models or virtual images. Comment on
symptoms of diseases that they cause.
7. Two plants and two animals (models/virtual images) found in xeric conditions. Comment
upon their morphological adaptations.
8. Two plants and two animals (models/virtual images) found in aquatic conditions. Comment
upon their morphological adaptations.

CBSE 12TH Biology Marking Scheme/Blueprint 2020-21

We cannot emphasize more on how much knowing the details of class 12th biology marking scheme/blueprint is important. This information allows the students prepare well and accordingly. Students must know how many MCQs will be there in the final question paper, based on what competencies the question paper is designed and how a student must answer in the final examination in order to score high marks. All such information can be very crucial.

When you are preparing for board exams you cannot afford to look past any detail as it can lead to your failure. Once you are done with your syllabus it is necessary to know that exam pattern, blueprint, marking scheme details. Keeping this in mind here we have presented the class 12th biology marking scheme 2020-21 for you.


Now that you are familiar with all the data regarding cbse class 12th biology marking scheme 2021 Blueprint/Mark Distribution you can study accordingly. You can bookmark this page for more updates on cbse class 12th related feeds.

We hope the content of this article was helpful for you. In case you have any query doe write in the comment section below. We would try all your doubts. All the best for your exams!

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