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CBSE Class 12 Biology Topic-Wise Weightage 2024: Chapter-wise distribution for theory and practicals

Check out the complete details regarding CBSE Class 12 Biology Topic-Wise Weightage 2024 below. Find here the breakdown of the marks distribution for both theory and practical exams.

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CBSE Class 12 Biology Topic-Wise Weightage 2024: The Central Board of Secondary Education has released the CBSE Class 12 Biology section-wise topics on the official website, cbseacademic.nic.in. As per the paper pattern, CBSE class 12 Biology exam will be conducted on 70 marks and will be held in 3 hours. On the other hand, the Class 12 Biology Practical exam will take place on 30 marks. In AY 2023-24, CBSE Class 12 exam will be held from February 15, 2024 onwards. While referring to the marks distribution given here, it is highly important to note that the unit-wise weightage is as officially provided by the CBSE board; however, on the contrary, the chapter-wise weightage is unofficial and derived from an analysis of the previous years' papers. Minor changes may be made to CBSE 12th Biology chapter-wise marks distribution and hence, students are advised to prepare accordingly.

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CBSE Class 12 Biology Topic-Wise Weightage 2024: Theory Exam

The unit-wise details of weightage distribution for CBSE 12th Biology 2024 theory exam are as follows:

Unit VI: Reproduction

Unit 6 ChaptersWeightage
Sexual Reproduction in Flowering Plants7 marks
Human Reproduction6 marks
Reproductive Health3 marks
Total Weightage16 marks

Unit VII: Genetics and Evolution

Unit 7 ChaptersWeightage
Principles of Inheritance and Variation8 marks
Molecular Basis of Inheritance8 marks
Evolution4 marks
Total Weightage20 marks

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Unit VIII: Biology and Human Welfare

Unit 8 ChaptersWeightage
Human Health and Diseases9 marks
Microbes in Human Welfare3 marks
Total Weightage12 marks

Unit IX: Biotechnology and Its Applications

Unit 9 ChaptersWeightage
Biotechnology - Principles and Processes6 marks
Biotechnology and its Applications 6 marks
Total Weightage12 marks

Also read | CUET UG Biology 2024 Expected Topic-Wise Weightage

Unit X: Ecology and Environment

Unit 10 ChaptersWeightage
Organisms and Populations5 marks
Ecosystem3 marks
Biodiversity and Its Conservation2 marks
Total Weightage10 marks

Also read |

CBSE Class 12 Biology Topic-Wise Weightage 2024: Practical Exam

Go through the weightage distribution of the CBSE Class 12 Biology Practical paper here in the following table:

Evaluation SchemeMarks Distribution
One major experiment 5 marks
One minor experiment4 marks
Slide preparation5 marks
Spotting7 marks
Practical record and viva voce4 marks
Investigatory project and its project record + viva voce5 marks
Total Weightage30 marks

Also Read | 

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