ICSE Class 10 Preboard Papers Biology: PDF Downloads
Download the ICSE class 10 preboard papers biology from the table below. The page hosts three pre-board exam papers covering the years 2023, 2025, and 2026. Each paper is an 80-mark, two-hour test, and you can download them directly without a signup.
Pre-board papers help you check your readiness before the final board exam. They mirror the real CISCE paper structure. You can also use our main Class 10 ICSE hub and the Class 10 books page to revise the chapters behind these questions.
Download ICSE Class 10 Biology Pre-Board Papers PDF
These are the 3 pre-board papers PDFs hosted on icseboard.org for ICSE Class 10 Biology, organised by subject. Each section below explains what those papers cover before the download table.
This group contains three Class 10 Biology pre-board exam papers from 2023, 2025, and 2026. Each paper is an 80-mark, two-hour test divided into a compulsory Section A and a Section B with four optional questions. The questions cover core syllabus topics like cell structure, genetics, human physiology, and environmental biology.
| Paper | Download |
|---|---|
| Pre Board Biology (2026) | Download PDF |
| Pb Biology (2025) | Download PDF |
| Pb Biology (2023) | Download PDF |
What the Biology Pre-Board Papers Cover Inside
These papers test the full Class 10 Biology syllabus. The questions trace directly to the core textbook chapters. You will see MCQs on cell structure, genetics, and plant physiology.
For example, the papers ask about the ground substance of a chloroplast, which ties to the chapter on Cell – The Structural and Functional Unit of Life. They also cover chromatin fibres and cell division, linking to the chapter on chromosome structure. The genetics questions test Mendel’s laws and dihybrid crosses. Plant physiology questions cover osmosis, imbibition, and root pressure.
Each paper splits into two parts. Section A is compulsory and carries 40 marks. Section B requires you to attempt any four questions for the remaining 40 marks.
Exam Pattern and Marks Across the 2023, 2025, and 2026 Papers
Every paper on this page follows the same official structure. The facts below come from the actual paper excerpts.
| Paper Year | Maximum Marks | Time Allowed | Section A Rule | Section B Rule |
|---|---|---|---|---|
| 2023 | 80 | Two hours | Attempt all questions (40 marks) | Do only four questions (40 marks) |
| 2025 | 80 | Two hours | Compulsory (40 marks) | Attempt any four questions (40 marks) |
| 2026 | 80 | Two hours | Compulsory (40 marks) | Attempt any four questions (40 marks) |
Each paper includes a 15-minute reading time before the writing time begins. You cannot write during this window. The 2026 papers use parentheses for mark tags, like (15), while the 2023 and 2025 papers use brackets, like [15]. This is a formatting difference, not a change in marks.
Topic Frequency in These Pre-Board Papers
Certain Biology topics appear repeatedly across the 2023, 2025, and 2026 papers. Practicing these high-frequency areas gives you the best return on study time.
- Assertion-Reason questions: Asked in 2025 and 2026. These test if you understand why a biological fact is true, not just the fact itself.
- Genetics and inheritance: Asked in 2023, 2025, and 2026. You must know Mendel’s laws, dihybrid crosses, and sex-linked diseases like haemophilia.
- Endocrine glands and hormones: Asked in 2025 and 2026. Questions cover the pituitary gland and the pancreas as a dual gland secreting enzymes and hormones.
- Human reproduction: Asked in 2023 and 2026. Topics include fertilization location and the placenta’s role in fetal respiration.
- Environmental biology: Asked in 2023 and 2026. This includes greenhouse effects, global warming, and non-biodegradable pollutants like DDT.
How to Use These Papers for Exam Preparation
Using pre-board papers effectively requires a structured approach. Treat each paper as a real exam simulation.
- Set a timer: Give yourself exactly two hours. Use the first 15 minutes only for reading.
- Attempt Section A first: Answer all the multiple-choice questions. Do not copy the questions; write only the answers to save time.
- Choose Section B wisely: Read all four options. Pick the four questions you know best before you start writing.
- Check mark tags: Look at the [15] or (15) tags. A 15-mark MCQ section needs quick, accurate answers. A 10-mark descriptive question needs detailed, labeled diagrams.
- Review weak spots: After finishing, check your answers against your textbook. Note where you lost marks and revise that chapter.
Worked Example: Solving an Assertion-Reason Question
Assertion-Reason questions appear in the 2025 and 2026 papers. They test deep understanding. Here is how to solve one using a genetics example.
Question: Assertion (A): In a monohybrid cross, the F1 generation shows dominant characters. Reason (R): Dominance occurs only in the heterozygous state.
Step 1: Check the Assertion. A monohybrid cross between two pure parents produces an F1 generation. If one parent is homozygous dominant and the other is homozygous recessive, the F1 offspring are all heterozygous. They show the dominant trait. So, Assertion (A) is true.
Step 2: Check the Reason. Dominance means one allele masks the other. This masking happens when two different alleles are present. That state is heterozygous. So, Reason (R) is also true.
Step 3: Check the link. The reason correctly explains why the F1 generation shows the dominant character. The F1 plants are heterozygous, which allows the dominant allele to express itself.
Answer: Both A and R are true, and R is the correct explanation of A.
Common Mistakes Students Make While Studying
Students lose marks on pre-board papers due to avoidable errors. Watch out for these specific traps.
- Skipping diagrams: Questions on the heart, brain, or nephron require labeled diagrams. Examiners cut marks for text-only answers in descriptive questions.
- Confusing terms: Students mix up stroma and stoma. The stroma is the ground substance of a chloroplast. A stoma is a pore on the leaf surface for gas exchange.
- Ignoring the reading time: The 15-minute reading window is for planning. Students who start writing late often rush Section B and make careless errors.
- Copying MCQ questions: The paper explicitly says not to copy the question. Writing the full question wastes time. Write only the correct option.
Frequently Asked Questions
How many pre-board Biology papers can I download here?
You can download three papers. They cover the years 2023, 2025, and 2026. Each paper carries 80 marks and lasts two hours.
Do these papers include solutions?
No. This page hosts the exam papers and study guidance. It does not provide solution sets. You should verify your answers using your CISCE-aligned textbook.
Are these papers aligned with the CISCE syllabus?
Yes. The papers follow the CISCE-aligned Class 10 Biology syllabus. They cover topics like cell division, genetics, and plant physiology. You can confirm syllabus details on the official CISCE website.
What is the format of Section A in these papers?
Section A is compulsory and carries 40 marks. It starts with 15 multiple-choice questions. The 2025 and 2026 papers also include assertion-reason questions in this section.
More ICSE study material on this site
Reference: CISCE-aligned ICSE Class 10 textbook material.