Karnataka 1st PUC Biology Syllabus 2025–26 | Complete Guide
1st PUC Biology forms the base for 2nd PUC boards, KCET medical entrance, and NEET preparation. The Karnataka 1st PUC Biology syllabus 2025–26 covers diversity of living organisms, plant and animal structure, cell biology, and human physiology topics that directly lead into Genetics, Biotechnology, and Human Health in 2nd PUC.
The subject includes 22 chapters across 5 units, carrying 70 marks for theory and 30 marks for practicals, following a rationalised, NCERT-based syllabus. At Giraffe Learning, Biology is taught with a strong focus on diagrams, clarity of processes, and exam-oriented presentation.
Why 1st PUC Biology Matters for Boards & Medical Entrance Exams
Karnataka 1st PUC Biology builds conceptual clarity that is essential for success in 2nd PUC Biology. Nearly 35% of KCET medical Biology comes directly from 1st PUC topics, especially cell biology and physiology.
The syllabus is diagram-heavy, testing understanding through labeled structures, flowcharts, and biological processes. Students who master classification, cell structure, and human systems early find advanced topics like genetics and molecular biology far easier later.
With structured preparation, students can confidently aim for 55–60+ out of 70 in theory, while practical exams significantly boost total scores.
1st PUC Biology Exam Pattern & Blueprint (2025–26)
The Biology exam consists of a 3-hour theory paper (70 marks) and a practical exam (30 marks).
Theory Paper Structure
- I-type questions (1 mark): 10 marks
- II-type questions (2–3 marks): 20–25 marks
- III-type questions (5 marks): 35–40 marks
- Internal choice available across sections
Practical Exam Structure
- Spotting: 12 marks
- Slide preparation: 8 marks
- Project / investigatory work: 5 marks
- Viva voce + record: 5 marks
Question Emphasis
- Diagrams: ~35%
- Processes & flowcharts: ~25%
- Definitions & short notes: ~25%
- Applications: ~15%
Blueprint alignment is crucial. The paper typically includes 40% easy, 40% moderate, and 20% higher-order questions.
Complete Unit-Wise 1st PUC Biology Syllabus
The NCERT-based syllabus progresses logically from living diversity to human systems.
1st PUC Biology Syllabus Table
| Unit | Chapter Name | Focus Topics | Marks |
|---|---|---|---|
| Unit I: Diversity in Living World | Chapter 1: Living World | Characteristics of life, biodiversity, taxonomy, binomial nomenclature | 3 |
| Chapter 2: Biological Classification | Five kingdom classification, monera, protista, fungi, viruses | 2 | |
| Chapter 3: Plant Kingdom | Algae, bryophytes, pteridophytes, gymnosperms, angiosperms | 5 | |
| Chapter 4: Animal Kingdom | Non-chordates (porifera to echinodermata), chordates classification | 7 | |
| Unit II: Structural Organisation | Chapter 5: Morphology of Flowering Plants | Root, stem, leaf, inflorescence, flower, fruit, seed | 4 |
| Chapter 6: Anatomy of Flowering Plants | Tissues (meristematic, permanent), tissue systems, secondary growth | 4 | |
| Chapter 7: Structural Organisation in Animals | Animal tissues, earthworm, cockroach, frog | 7 | |
| Unit III: Cell Structure & Function | Chapter 8: Cell – The Unit of Life | Cell theory, prokaryotic/eukaryotic cells, organelles | 8 |
| Chapter 9: Biomolecules | Carbohydrates, proteins, lipids, enzymes, nucleic acids | 5 | |
| Chapter 10: Cell Cycle and Cell Division | Cell cycle phases, mitosis, meiosis | 5 | |
| Unit IV: Plant Physiology | Chapter 11: Transport in Plants | Diffusion, osmosis, transpiration, ascent of sap | 5 |
| Chapter 12: Mineral Nutrition | Essential minerals, deficiency symptoms, nitrogen metabolism | 5 | |
| Chapter 13: Photosynthesis | Pigments, light/dark reactions, C3/C4 pathways | 5 | |
| Chapter 14: Respiration in Plants | Glycolysis, TCA cycle, electron transport, fermentation | 5 | |
| Chapter 15: Plant Growth & Development | Growth phases, hormones, photoperiodism | 5 | |
| Unit V: Human Physiology | Chapter 16: Digestion & Absorption | Alimentary canal, enzymes, nutrient absorption | 3 |
| Chapter 17: Breathing & Gas Exchange | Respiratory organs, mechanism, regulation | 3 | |
| Chapter 18: Body Fluids & Circulation | Blood, lymph, heart, double circulation | 4 | |
| Chapter 19: Excretory Products & Elimination | Kidney structure, urine formation, regulation | 3 | |
| Chapter 20: Locomotion & Movement | Muscles, skeletal system, disorders | 3 | |
| Chapter 21: Neural Control & Coordination | Neuron, reflex arc, brain, sensory organs | 4 | |
| Chapter 22: Chemical Coordination | Endocrine glands, hormones, disorders | 5 |
Practice at least 60+ diagrams and master classification charts and physiological flowcharts for scoring well.
Chapter-Wise Weightage & Priority Areas
| Unit | Marks Range | Key Focus | Diagram Weight |
|---|---|---|---|
| Human Physiology (16–22) | 25–30 | Organ systems, processes | Highest (≈15) |
| Plant Physiology (11–15) | 18–22 | Photosynthesis, transport | High (8–10) |
| Diversity (1–4) | 12–15 | Classification, examples | Medium |
| Cell Biology (8–10) | 12–15 | Organelles, cell cycle | High |
Insight: Physiology alone contributes nearly 60% of the paper. Always verify the latest DPUE blueprint for final weightage.
Practical & Lab Components: How to Score Full Marks
Biology practicals contribute 30 crucial marks.
- Spotting (12 marks): Plant specimens, animal specimens, charts (heart, nephron, neuron)
- Slide preparation (8 marks): Onion peel, cheek cells, leaf mounts, blood smear
- Project / investigatory work (5 marks): Seed germination, osmosis, pigment separation
- Viva + record (5 marks): Specimen-based questions and certified practical record
Students should practise 25+ labeled diagrams and multiple slide preparations to build confidence.
Biology Practical Examination – Marks Distribution
| Component | Details | Marks |
|---|---|---|
| Spotting | Plant specimens, animal specimens, charts (heart, nephron, neuron) | 12 |
| Slide Preparation | Onion peel, cheek cells, leaf mounts, blood smear | 8 |
| Project / Investigatory Work | Seed germination, osmosis, pigment separation | 5 |
| Viva Voce + Record Work | Specimen-based questions and certified practical record | 5 |
| Total | 30 | |
How to Study 1st PUC Biology Effectively
- Practise 60 labeled diagrams across units
- Master classification charts for plants and animals
- Create flowcharts for photosynthesis, digestion, and cell cycle
- Memorise 25 key physiological processes with diagrams
- Solve 5 years of PUC I papers focusing on diagram questions
- Daily NCERT revision + one unit-based practical review
NEET Link: Units on diversity, cell biology, and physiology together form 35% of KCET/NEET Biology foundation.
Free 1st PUC Biology Downloads
Get exam-ready Biology resources in one place:
- Karnataka 1st PUC Biology Syllabus, Blueprint and Question Bank 2025–26 PDF
- Other 2025-26 model papers from the DPUE website
Build a strong Biology foundation with Giraffe Learning's 1st PUC Biology program. With diagram-focused teaching, regular tests, and clear exam strategy, we help students score confidently in boards and move smoothly into 2nd PUC and medical entrance preparation.
Frequently Asked Questions about 1st PUC Biology Syllabus
There are 22 chapters across 5 units, from Diversity to Human Physiology.
Human Physiology carries the highest weightage, around 25–30 marks.
Diagrams contribute nearly 35% of the theory paper and are compulsory.
About 35% of medical entrance Biology comes from 1st PUC topics.
Spotting (12), slides (8), project (5), viva/record (5).
Typically 40% easy, 40% moderate, and 20% difficult questions.
Yes. Karnataka 1st PUC Biology follows the NCERT structure.
The syllabus is available on the DPUE Karnataka website.
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Exam Pattern & Syllabus
