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PSEB 12th Biology Chapter-Wise Weightage Marks 2026PSEB Class 12 Biology Chapter-Wise Weightage Marks 2026 helps students prepare strategically by identifying scoring areas and understanding the paper pattern clearly. Based on the blueprint, high-priority chapters include Sexual Reproduction in Flowering Plants, Principles of Inheritance and Variation, Human Health and Disease, Ecosystem, and Body Genetics-related chapters, as these carry higher weightage and frequently include long-answer and diagram-based questions. Chapters from Ecology and Environment and Biotechnology are also important, especially for conceptual and application-based questions. Students should focus on diagrams, flowcharts, definitions, and comparison-based answers while revising these units.
PSEB 12th Biology Chapter-Wise Weightage Marks 2026
Go through the chapter-wise weighatge for PSEB 12th Biology Chapter-Wise Weightage Marks 2026 below.
Chapter No. | Chapter Name | Marks Distribution (Pattern) | Total Marks |
|---|---|---|---|
1 | Sexual Reproduction in Flowering Plants | (1×1) + (1×2) + (1×5) | 8 |
2 | Human Reproduction | (2×1) + (1×2) | 4 |
3 | Reproductive Health | (2×1) + (1×2) | 4 |
4 | Principles of Inheritance and Variation | (1×1) + (1×2) + (1×5) | 8 |
5 | Molecular Basis of Inheritance | (1×1) + (1×3) | 4 |
6 | Evolution | (1×1) + (1×2) + (1×3) | 6 |
7 | Human Health and Disease | (3×1) + (1×2) + (1×3) | 8 |
8 | Microbes in Human Welfare | (2×1) + (1×2) | 4 |
9 | Biotechnology: Principles and Processes | (2×1) + (1×2) + (1×3) | 4 |
10 | Biotechnology and Its Applications | (1×1) + (1×2) + (1×3) | 6 |
11 | Organisms and Populations | (1×1) + (1×3) | 4 |
12 | Ecosystem | (1×1) + (1×2) + (1×5) | 8 |
13 | Biodiversity and Conservation | (2×1) | 2 |
PSEB 12th Biology Unit-Wise Weightage Marks 2026
Find the unit-wise weightage for PSEB 12th Biology 2026 below.
Unit | Unit Name | Marks |
|---|---|---|
I | Reproduction | 16 |
II | Genetics and Evolution | 18 |
III | Biology and Human Welfare | 12 |
IV | Biotechnology and Its Applications | 10 |
V | Ecology and Environment | 14 |
Total | 70 Marks | |
PSEB 12th Biology Question Paper Blueprint 2026
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Here’s the question paper blueprint for PSEB 12th Biology 2026.
Question Type | Number of Questions | Marks |
|---|---|---|
1 Mark | 20 Questions | 20 |
2 Marks | 10 Questions | 20 |
3 Marks | 5 Questions | 15 |
5 Marks | 3 Questions | 15 |
Total | 38 Questions | 70 Marks |
As per the instructions to the paper setter, the question paper will consist of four sections, A, B, C, and D, with a total of 19 questions. Section A will include 20 one-mark questions comprising MCQs, fill-in-the-blanks, and true/false items. Section B will have 10 short-answer questions of 2 marks each, with internal choices in selected questions. Section C will consist of 5 questions of 3 marks each, again with internal choices. Section D will include 3 long-answer questions of 5 marks each, where diagram-based and comprehension-type questions are compulsory, particularly from Chapter 12 (Ecosystem). The paper will also include at least one comparison-based question, and the language used will be clear, simple, and specific, ensuring better understanding for students.
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