ICSE Class 10 Exam Pattern and Marking Scheme 2025: The ICSE Class 10 Biology exam is an important subject in the Science stream, designed to evaluate students’ understanding of fundamental concepts in biology with applications, and problem-solving skills. For 2025, the ICSE Board has made available a structured exam pattern, including a balance of theory and practical applications. This article provides an overview of the exam pattern, marking scheme, and topic-wise weightage to help students prepare effectively.
ICSE Class 10 Biology Topic-Wise Weightage Distribution 2025
The ISCE board does not assign specific marks weightage to individual chapters. However, based on the analysis of previous sample papers, we offer students an estimated weightage for each chapter.
| Unit/Topic | Subtopics | Estimated Marks | Remarks |
| 1. Basic Biology | Cell cycle, cell division, chromosome structure, genetics | 12 | Emphasis on Mendel's laws, cell division processes, and genetics terminology. |
| 2. Plant Physiology | Absorption, transpiration, photosynthesis, plant hormones | 16 | Key experiments (photosynthesis, transpiration) and plant adaptations are critical. |
| 3. Human Anatomy and Physiology | Circulatory, excretory, nervous, endocrine, reproductive systems | 28 | Detailed focus on diagrams, processes, and systems like heart, kidney, reflex arc, and hormonal roles. |
| 4. Population | Population explosion, control measures | 6 | Causes, effects, and methods of population control. |
| 5. Human Evolution | Theories of evolution, human ancestry | 6 | Concepts of natural selection, Lamarckism, and characteristics of human ancestors. |
| 6. Pollution | Types, sources, effects, control measures | 12 | Major focus on air, water, and noise pollution, climate effects, and waste management. |
ICSE Class 10 Biology Question Paper Format 2025
| Section | Type of Questions | Marks | Details |
| Section A | Short-answer questions | 40 | - Compulsory questions from the entire syllabus. |
| - Includes definition-based, reasoning, and direct questions. | |||
| - May include labelling diagrams, match the following, or differentiate between concepts. | |||
| Section B | Long-answer questions with choices | 40 | - Requires detailed explanations, diagrams, and reasoning. |
| - Internal choice provided (e.g., answer any 4 out of 6 questions). | |||
| Diagram-based questions | - In-depth diagram labelling or construction is likely included, such as heart, nephron, or reflex arc. |
Key Features of the Question Paper:
- Duration: 2 hours.
- Marks Distribution: Total of 80 marks (plus 20 marks for Internal Assessment).
ICSE Board Class 10 Biology Exam Pattern 2025
| Component | Details |
| Total Marks | 100 (80 marks for the written exam + 20 marks for internal assessment) |
| Duration | 2 hours for the written examination. |
| Question Paper Format | |
| Section A | - Short-answer questions (40 marks). |
| - Covers the entire syllabus. | |
| - Questions may include definitions, reasoning, fill-in-the-blanks, and diagram labelling. | |
| Section B | - Long-answer questions (40 marks). |
| - Internal choice provided (e.g., answer 4 out of 6 questions). | |
| - Focus on detailed explanations, labelled diagrams, and conceptual clarity. | |
| Internal Assessment | - Project work and practical experiments (20 marks). |
| - Assessed by the school, based on the quality of work and viva voce. |
The ICSE Class 10 Biology exam pattern for 2025 provides a well-rounded framework that combines theoretical concepts with practical applications. Understanding the marking scheme and topic-wise weightage allows students to plan their study schedules effectively. Focusing on topics with higher weightage can enhance preparation and improve performance in the ICSE Class 10 Biology exam.
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