Free Biology Notes for Students
Complete Biology Toolkit in One Place
Biology Notes Online provides free study notes, lecture videos and microscopic images covering microbiology, botany, zoology, biochemistry, genetics, cell biology and laboratory methods for A-level, AP, IB, BSc and MSc students.
All Biology Topics
Explore Every Branch of Biology – Dive Deep, Scroll Wide, Learn Fast
- Agricultural Microbiology 12 posts
- Bacteriology 99 posts
- Basic Microbiology 93 posts
- Biochemistry 102 posts
- Bioinformatics 25 posts
- Biotechnology 11 posts
- Cell Biology 121 posts
- Environmental Microbiology 105 posts
- Food Microbiology 55 posts
- Genetics 99 posts
- Immunology 102 posts
- Industrial microbiology 24 posts
- Medical Microbiology 46 posts
- Microscope 28 posts
- Molecular biology 85 posts
- Mycology 48 posts
- Parasitology 32 posts
- Phycology 25 posts
- Prions 2 posts
- Protozoa 15 posts
- Virology 64 posts
- Angiosperms 31 posts
- Archegoniate 12 posts
- Biodiversity 1 post
- Economic Botany 14 posts
- Ethnobotany 5 posts
- Horticultural 10 posts
- Natural Resource Management 3 posts
- Plant Anatomy and Embryology 20 posts
- Plant Breeding 16 posts
- Plant Ecology and Taxonomy 15 posts
- Plant Physiology and Metabolism 18 posts
- Animal Behaviour 1 post
- Basic Zoology 6 posts
- Biology of Insecta 15 posts
- Chordates 27 posts
- Developmental Biology 20 posts
- Endocrinology 17 posts
- Ethology 6 posts
- Evolutionary Biology 21 posts
- Fish and fisheries 25 posts
- Human Anatomy 16 posts
- Neuroscience 17 posts
- Non-chordates 20 posts
- Pest Management 4 posts
- Physiology 52 posts
- Protista 15 posts
- Reproductive Biology 5 posts
- Research Methodology 7 posts
- Vertebrata 13 posts
- Biochemical Test 88 posts
- Botany Practicals 2 posts
- Culture Media 77 posts
- Cytopathology 1 post
- Hematology 7 posts
- Immunology Practical 19 posts
- Instruments 152 posts
- Laboratory Techniques 5 posts
- Laboratory Tests 14 posts
- Microbiology Techniques 19 posts
- Protocols 15 posts
- Staining 41 posts
- Under Microscope 24 posts
- Differences 170 notes
- Research Methodology 7 notes
- Syllabus 6 notes
- Bacteriology 99 posts
- Mycology 48 posts
- Parasitology 32 posts
- Phycology 25 posts
- Prions 2 posts
- Protozoa 15 posts
- Virology 64 posts
Latest Notes
Toluidine Blue Staining – Principle, Procedure, Results and Uses
Toluidine blue staining explained with its principle, preparation, procedure, results, mast cell staining, histological uses, and limitations.
-
Iron-Hematoxylin Staining – Principle, Procedure, Uses
Hematoxylin is extracted from a leguminous plant, known as Haematoxylon campechianum, thus it is a natural dye. It forms hematein by oxidation (Ripening).
-
Acridine Orange Staining – Principle, Procedure, Uses
Acridine Orange contains metachromatic properties, that’s why it is employed in fluorescence microscopy and flow cytometry study of cellular physiology and cell cycle state,…
-
Kinyoun Stain Method – Principle, Procedure and Results
Kinyoun stain method explained with its principle, reagents, procedure, result interpretation, modifications, applications, and Ziehl-Neelsen comparison.
-
Ziehl-Neelsen Staining (ZN Staining) – Principle, Procedure and Results
Ziehl-Neelsen Staining (ZN Staining): principle, reagents, procedure, positive and negative results, AFB smear grading, modified methods, and limitations.
-
Lactophenol Cotton Blue (LPCB) Staining – Principle and Procedure
Lactophenol Cotton Blue (LPCB) Staining covers the principle, composition, solution preparation, fungal wet-mount procedure, microscopic results, and limitations.
-
Sudan Black B Staining – Principle, Procedure and Results
Sudan Black B staining guide covering its principle, reagents, frozen-section and bacterial smear procedures, positive results, applications and limitations.
-
Parasporal Crystal Staining – Principle, Procedure and Results
Parasporal crystal staining explained with its principle, Coomassie Brilliant Blue procedure, required materials, microscopic results, uses and limitations.
-
Flagella Staining – Principle, Reagents, Procedure and Results
Flagella staining in microbiology – principle, reagents, Ryu and Leifson methods, step-by-step procedures, result interpretation, and limitations.
-
Bacterial Smear Preparation – Principle, Materials and Procedure
Bacterial smear preparation explained with its principle, materials, procedure from broth and agar cultures, fixation methods, and precautions.
Discover the Microscopic World
Share and explore stunning microscopic images of microorganisms in our growing community.
Sourav Pan 
