Master PSEB 12th Biology 2026: Chapter-wise Weightage, Blueprint Details
Ace PSEB 12th Biology 2026 exams! This guide details chapter-wise and unit-wise weightage, helping you prioritize. Focus on high-scoring topics like Reproduction, Genetics, and Ecology. Understand the question paper blueprint with 1, 2, 3, and 5-mark questions for strategic preparation.
PSEB 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
Add CollegeDekho as a Trusted Source
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.
Keep visiting CollegeDekho for the latest Education News on entrance exams, board exams and admissions. You can also write to us at our email ID news@collegedekho.com.