FBISE Biology Guess Paper 2026 HSSC-I (1st Year) | Federal Board Biology Important Topics

Are you preparing for the FBISE Biology HSSC-I (1st Year) Annual Examinations 2026? This carefully prepared guess paper covers the most important topics from the National Book Foundation (NBF) Biology syllabus. It is designed to help students revise high-scoring concepts, important definitions, diagrams, and long questions before the board examination.

🧬 FBISE Biology Guess Paper 2026

Chapter 01: Cells and Sub-Cellular Organelles

• List of single and double membrane-bound organelles
• Ultra structure of animal and plant cells
• Golgi Complex, Plasma Membrane, Lysosomes, Endoplasmic Reticulum, Ribosomes and Nucleus
• Cell Signaling

Chapter 02: Molecular Biology

• Amylase and Amylopectin
• Last 3–4 lines of all properties of water
• Structural conformation and classification of proteins
• Significance of amino acids
• Types of fatty acids
• Phospholipids, Steroids and Prostaglandins
• Watson and Crick Model of DNA

Chapter 03: Enzymes

• Types of Cofactors
• Enzyme Inhibition
• Definitions of Ribozyme, Apoenzyme and Holoenzyme
• Effect of Temperature on Enzyme Activity
• Characteristics of Enzymes

Chapter 04: Bioenergetics

• Photophosphorylation
• Glycolysis
• Krebs Cycle
• Calvin Cycle
• Electron Transport Chain (ETC)

Chapter 05: Acellular Life

• Life Cycle of Bacteriophage
• Life Cycle of HIV
• Prions and Viroids
• Symptoms of AIDS

Chapter 06: Prokaryotes

• Cyanobacteria
• Growth and Reproduction in Bacteria
• Definitions of Conjugation, Transduction and Transformation
• Physical and Chemical Methods to Control Bacteria
• Chemosynthetic Bacteria

Chapter 07: Protista and Fungi

• Protista as a Polyphyletic Group
• Why Fungi are Classified as a Separate Kingdom
• Lichens and Mycorrhizae

Chapter 08: Plantae

• Characteristics of Bryophytes
• Characteristics of Tracheophytes
• Angiosperms

Chapter 09: Diversity in Plant Functions

• Opening and Closing of Stomata
• TACT Theory
• Thermoregulation in Plants
• Photoperiodism

Chapter 10: Animalia

• Classification Based on Body Type
• Phylum Cnidaria
• Phylum Arthropoda
• Phylum Chordata
• Phylum Echinodermata

Chapter 11: Reproduction

• Hormonal Control of Male Reproductive Function
• Female Reproductive Cycle and Hormonal Regulation

Chapter 12: Inheritance

• Incomplete Dominance
• Epistasis
• Genetics of Haemophilia and Colour Blindness

Chapter 13: Chromosome and DNA

• Griffith Experiment
• Mechanism of DNA Replication
• Characteristics of the Genetic Code and Protein Synthesis Practice
• Post-Transcriptional Modification
• Down Syndrome
• Sources and Types of Mutations

Chapter 14: Evolution

• Endosymbiotic Theory
• Postulates and Limitations of Lamarckism and Darwinism
• Evidence of Evolution from Comparative Anatomy and Molecular Biology

Chapter 15: Ecology

• Nitrogen Cycle
• Ecological Succession

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📚 Preparation Tips

• Revise all important definitions and scientific terms.
• Practice diagrams of cells, organelles and DNA replication.
• Memorize biological cycles and life cycles.
• Prepare all textbook exercises and board-style short questions.
• Focus on conceptual understanding instead of rote learning.

Disclaimer: This guess paper is prepared for educational purposes based on important topics and previous examination trends. Students are advised to prepare the complete syllabus for the best performance in FBISE Annual Examinations 2026.