10th Class Chemistry Chapter 25 Notes 2026 PDF

Chapter 25: Biochemistry (New Syllabus)

The Class 10 Chemistry Chapter 25 Notes — Biochemistry have been freshly uploaded and are now available for free download in PDF format. These notes are prepared strictly according to the new syllabus (2026–27) and are ready to help you revise the chapter quickly before your exams.

Latest Update

As per the latest update in August 2026, these notes have been revised to match the current Punjab Curriculum and Textbook Board (PCTB) syllabus for Chemistry, Class 10. Every heading, definition, classification, and question in this chapter has been rechecked against the newest textbook edition so that students preparing for their board exams get 100% accurate and up-to-date material — no outdated content, no missing topics.

We Know You Are Looking for These Notes

If you’re reading this, chances are you’ve already searched “Class 10 Chemistry Chapter 25 notes” more than once today. You’re not alone — thousands of students across Punjab search for this exact chapter every exam season, because Biochemistry brings chemistry into the human body itself, covering carbohydrates, proteins, and lipids in a way that overlaps with biology but demands a distinctly chemical way of thinking. Terms like amino acids, peptide linkage, essential and non-essential amino acids, and triglycerides can easily blur together without a clear, organized structure. The good news is, you’re just one click away. These notes have been written in simple, exam-friendly language, broken down heading by heading, so that even a student who found carboxylic acids a bit technical in the last chapter can confidently explain how proteins are built from amino acids and how fats are classified.

Why This Subject Matters

Biochemistry is the chemistry of life itself — it explains what your food is actually made of at a molecular level and why your body needs carbohydrates, proteins, and fats to function. Chapter 25 introduces students to the three major classes of biomolecules: carbohydrates as a source of energy, proteins built from amino acids linked by peptide bonds, and lipids classified into oils and fats. This chapter connects directly to nutrition and everyday health, helping students understand not just abstract formulas, but why a balanced diet matters and what’s actually happening chemically when their body digests food.

All Chapters – Class 10 Chemistry Notes (New Syllabus)

Below is the complete chapter-wise list for Matric Part 2 Chemistry. You can find Biochemistry at Chapter 25 (Chapter 12 of the Class 10 portion), along with links to every other chapter in both English and Urdu medium.

Chapter 25 Breakdown: Biochemistry

This chapter has been split into four easy-to-revise sections so you can study exactly what you need, right before a test or a board paper.

MCQs (New Syllabus)

Objective-type questions covering key terms like carbohydrates, amino acids, peptide linkage, lipids, and triglycerides — perfect for quick daily revision and for practicing the objective portion of your paper.

Short Questions (New Syllabus)

Two-to-three-line answers on core concepts such as the difference between essential and non-essential amino acids, the classification of carbohydrates, and what lipids are made of — exactly the kind of questions that appear most frequently in board exams.

Long Questions (New Syllabus)

Detailed, exam-length answers explaining topics in depth, such as a complete classification of carbohydrates with examples, the formation of peptide linkages between amino acids, and the classification and structure of lipids including oils and fats.

Exercise Questions (New Syllabus)

Solved answers to every question given at the end of the chapter in your textbook, so you never have to guess whether your homework answer is correct.

Available for All Punjab Boards

These notes are prepared according to the Punjab Curriculum and Textbook Board syllabus, which means they are equally valid and useful for students appearing under any of the following boards:

• BISE Lahore
• BISE Gujranwala
• BISE Faisalabad
• BISE Multan
• BISE Sargodha
• BISE Rawalpindi
• BISE Sahiwal
• BISE Bahawalpur
• BISE DG Khan

Students appearing under the Federal Board (FBISE) Islamabad can also use these notes, as the new syllabus content is largely aligned across boards following the Single National Curriculum.

Benefits of Downloading These Notes

• Covers every heading of Chapter 25 in simple, exam-friendly language
• Prepared and reviewed by experienced chemistry teachers
• Includes solved MCQs, Short Questions, Long Questions, and Exercise Questions in one place
• Explains amino acids, proteins, and lipids using clear, relatable everyday examples
• Saves you the time of making notes from scratch before exams
• Available completely free of cost, with no hidden registration required
• Formatted for quick last-night-before-the-paper revision
• Available in both English medium and Urdu medium PDF versions
• Helps you score better marks by focusing on exactly what examiners ask

Preparing from organized, chapter-wise notes instead of jumping around a thick textbook is one of the simplest ways to save time and reduce exam stress. Whether you’re revising a day before your test or finally understanding what’s actually in the food on your plate this week, these notes are structured so you always know exactly where you are in the chapter.

How to Download

1. Scroll to the chapter table above and locate Chapter 25 – Biochemistry.
2. Choose your preferred medium — English or Urdu.
3. Click the View/Download button to open the PDF.
4. Save it to your device or print it out for offline study.

No sign-up, no payment, and no waiting — the notes open directly in your browser and can be downloaded in a single tap.

Related Subjects – Class 10 Notes

While you’re preparing your chemistry chapter, you might also need notes for your other subjects. Related Class 10 notes available on this platform include:

• Mathematics
• Physics
• Biology
• Computer Science
• English
• Urdu
• Pakistan Studies
• Islamiat
• General Math

All of these are organized the same way — chapter-wise, board-aligned, and free to download.

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Stay updated with new chapter uploads, past papers, and guess papers by following along on our social platforms. Join our WhatsApp study group for instant notifications whenever new chapters are added, follow our Facebook page for daily exam tips, and subscribe to our YouTube channel for full video lectures that walk through each heading of this chapter — including a clear breakdown of how peptide bonds form between amino acids — step by step.

Frequently Asked Questions (FAQs)

Q1: Are these Class 10 Chemistry Chapter 25 notes free to download?

Yes, all notes on this page — including MCQs, Short Questions, Long Questions, and Exercise Questions — are completely free with no hidden charges.

Q2: Which boards are these notes suitable for?

These notes follow the Punjab Curriculum and Textbook Board syllabus and are valid for all Punjab boards, including Lahore, Gujranwala, Multan, Faisalabad, and others, as well as FBISE Islamabad.

Q3: Do these notes cover the new syllabus (2026–27)?

Yes, these notes are fully updated according to the current Punjab Curriculum and Textbook Board syllabus for Class 10 Chemistry.

Q4: Does this chapter overlap with Biology class content?

There’s some natural overlap since both subjects touch on carbohydrates, proteins, and lipids, but this chapter approaches the topic from a chemical structure and reaction perspective, so it’s worth studying separately even if you’ve covered similar terms in Biology.

Q5: Are Urdu medium notes also available for this chapter?

Yes, both English medium and Urdu medium PDFs are available for Chapter 25 – Biochemistry.

Q6: How do I download the PDF notes?

Simply click the View/Download link next to Chapter 25 in the chapter table above, and the PDF will open for viewing or saving to your device.

Have a question about this chapter or found these notes helpful? Share your comments and questions below — we’re always updating our content based on student feedback.