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ISC Class 12 Biology Chapter-Wise Weightage 2024

Check out the complete details regarding ISC Class 12 Biology Chapter-Wise Weightage 2024 below. Find here the breakdown of the marks distribution for the theory paper.

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ISC Class 12 Biology Chapter-Wise Weightage 2024: For Class 12, the Council for the Indian School Certificate Examinations (CISCE) has declared the unit-wise weightage for all major subjects and the same official weightage for units is detailed here. However, in regards to the chapter-wise weightage, it is based on the analysis of previous papers and is unofficial in nature. The chapter-wise marks distribution may have minor changes but the unit-wise distribution will strictly be followed in the question paper.

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ISC Class 12 Biology Chapter-Wise Weightage 2024

The total marks distribution for all units and their respective chapters is as follows:

Unit 1: Reproduction

Chapter Name Total Weightage without options Total Weightage with options
Sexual reproduction in flowering plants 6 marks 9 marks
Human Reproduction 5 marks 7 marks
Reproductive Health 5 marks 7 marks
Total 16 marks 23 marks

Unit 2: Genetics and Evolution

Chapter Name Total Weightage without options Total Weightage with options
Principles of inheritance and variation 5 marks 7 marks
Molecular basis of Inheritance 4 marks 6 marks
Evolution 6 marks 9 marks
Total 15 marks 22 marks

Unit 3: Biology and Human Welfare

Chapter Name Total Weightage without options Total Weightage with options
Human Health and Diseases 8 marks 11 marks
Microbes in Human Welfare 6 marks 8 marks
Total 14 marks 19 marks

Unit 4: Biotechnology and its Applications

Chapter Name Total Weightage without options Total Weightage with options
Biotechnology - Principles and processes 5 marks 7 marks
Biotechnology and its applications 5 marks 8 marks
Total 10 marks 15 marks

Unit 5: Ecology and Environment

Chapter Name Total Weightage without options Total Weightage with options
Organisms and Populations 6 marks 8 marks
Ecosystem 4 marks 6 marks
Biodiversity and its Conservation 5 marks 7 marks
Total 15 marks 21 marks


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