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- General Biology
- Cell Biology
- How the Sodium Potassium Pump Works
- Receptors Linked to a Channel Protein
- How the Sodium-Potassium Exchange Pump Works
- How the Sodium-Potassium Exchange Pump Works (2)
- Cotransport (Symport and Antiport)
- How the Proton Pump in a Cell Works
- How Endocytosis & Exocytosis Work in a Cell
- How the Second Messenger- cAMP Works
- How the Second Messengers – The cAMP and Ca Pathways Work
- How Signal Amplification Works in a Cell
- Intracellular Receptor Model of Action
- How Intracellular Receptors Regulate Gene Transcription
- Membrane-bound Receptors, G proteins and Ca channels
- Control of the Cell Cycle
- Overview of Cell Division
- Mitosis and Cytokinesis
- How Meiosis Works
- Random Orientation of Chromosomes During Meiosis
- Stages of Meiosis
- Unique Features of Meiosis
- Meiosis I
- Meiosis II
- Comparison of Meiosis and Mitosis
- Cytokinesis
- How Tumor Suppressor Genes Block Cell Division
- How Lysosomes Work in a Cell
- How Lysosomes Work in a Cell (2)
- More
- Hormones (Endocrine System)
- Positive and Negative Feedback in the Body
- Hormonal Communication in the Body
- Steroid Hormones: Mechanism of Action
- Thyroid Hormones: Mechanism of Action
- Epinephrine: Mechanism of Action on a Liver Cell
- Insulin & Glucagon: Blood Sugar Regulation in Diabetics
- Glucocorticoid Hormones: Mechanism of Action
- How Bone Growth in Width Occurs
- How Osteoporosis Occurs
- More
- Nervous & Muscular Systems
- Voltage-gated Channels and the Action Potential
- The Nerve Impulse
- Transmission Across a Synapse
- Chemical Synapse
- Unmyelinated Axon: Propagation of Action Potential
- How Hearing Works: Effect of Sound Waves on Cochlea
- Action Potential & Muscle Contraction (Excitation-Contraction Coupling)
- Breakdown of ATP and Cross-Bridge Movement During Muscle Contraction
- Neuromuscular Junction Function
- Myofilament Contraction
- Sarcomere Contraction
- Sarcomere Shortening
- More in Muscular System
- More in Nervous System
- Special Senses
- Circulatory (Cardio-vascular) System
- Respiratory System
- Digestive System
- The Digestive System: Overview
- Organs of Digestion
- Hydrochloric Acid Production of the Stomach
- Reflexes in the Colon
- Energy Sources for Prolonged Exercise
- Enzyme Action and the Hydrolysis of Sucrose
- B Vitamins & Co-Factor Roles
- Three Phases of Gastric Secretion
- Function of Pancreas & Cystic Fibrosis
- Irritable Bowel Syndrome: Pain Pathway
- More
- Urinary System
- Reproductive System
- Immunology
- The Lymphatic System: Overview
- Process of Phagocytosis in the Immune System
- The Inflammatory Response
- The Immune Response
- Immune Response – Detailed
- Complement System: Activation during Immune Response
- Antigen Processing by Antigen Presentating Cells
- Antigenic Determinants (Epitopes)
- Cytotoxic T-Cell Activity against Target Cells
- Hypersensitivity
- T-cell dependant Antigens
- Interferons: Antiviral Activity
- Antibody Diversity – Different Heavy and Light Chains / Isotypes
- Monoclonal Antibody Production: Hybridoma Technique
- Superantigens
- ELISA: Enzyme-Linked Immunosorbent Assay
- Complement Fixation Test
- Phagocytic Cells: Phagocytosis & Antigen Presentation
- Why Fever Happens
- Complement Proteins
- Antiviral Defence
- Clonal Selection of B cells, Plasma & Memory Cells
- T-cell function
- How Vaccination Works
- Microbiology
- Bacteria
- Gram Stain Principle & Technique
- Peptidoglycan Biosynthesis in Gram Negative Bacteria
- Prokaryotic Cell Shapes
- Biofilm Formation by Bacteria
- Food Spoilage by Bacteria
- Food Pathogens and Temperature
- Antibiotics: Protein Synthesis Inhibition
- Antibiotics: Cell Wall Inhibition
- Bacterial Locomotion / Movement
- Chemotaxis in E. coli
- Bacterial Endospore Formation
- Binary Fission in Bacteria
- Bacterial chromosome compaction
- Diphtheria Exotoxins: A-B Exotoxins
- Viruses
- Polio Virus: Transmission & Life Cycle
- How HIV Replication Occurs
- How the HIV Infection Cycle Works
- Treatment of HIV
- T2 Phage: Life Cycle
- T4 Phage: Replication in E. coli
- Lamda Phage Replication Cycle
- Temperate Phage – Specialized Transduction
- Entry of Virus into Host Cell
- Mechanism for Releasing Enveloped Viruses
- Replication Cycle of a Retrovirus
- Replication of a Positive (+) Sense Strand of Lytic RNA Phage
- Antiviral Agents / Drugs
- How Prions Arise (Infectious Proteins)
- Bacteria
- Biochemistry
- A Typical Biochemical Pathway
- Feedback Inhibition of Biochemical Pathways
- How the Krebs Cycle Works
- How the NAD+ Works
- Active Transport by Group Translocation
- Electron Transport System and Formation of ATP
- Protein Synthesis in a Cell
- Bacterial Protein Synthesis
- Protein Structure and Protein Denaturation
- Hemoglobin Breakdown Pathway
- Plant life
- Genetics & Molecular Biology
- Changes in Chromosome Structure
- How Bacterial Conjugation Works
- X inactivation
- Evolution of Homologous Genes (from the same origin)
- How Simple Gene Expression Works
- Structure of DNA
- Ionic vs Covalent Bonding
- mRNA Synthesis: Transcription
- How DNA Replication Occurs
- Structural Basis of DNA Replication
- How Nucleotides are added in DNA Replication
- Proofreading of DNA polymerase
- Action of DNA Gyrase
- Function of Cohesins in Chromosomes
- Function of Telomerase in a Cell
- Stages of Transcription (in Protein Synthesis)
- How Transcription (of mRNA) Works
- Factors involved in the Transcription of mRNA
- How RNA Splicing Occurs (Removal of Introns)
- Aminoacyl tRNA synthetase
- How Mitosis Works
- Translation
- Control of Gene Expression
- Exon Shuffling (after Translation in Protein Synthesis)
- Chromatin Remodeling (Part of Transcriptional Activation)
- RNA Interference: Silencing Gene Expression
- Direct Repair: DNA Repair Mechanisms
- Nucleotide Excision Repair: DNA Repair Mechanisms
- DNA Mutation by Base Substitution
- Addition and Deletion Mutations of the DNA
- Thymine Dimers: Formation and Repair (DNA Mutation)
- Regulatory Proteins: Regulation of Genes by Repression
- The Lac Operon (Induction)
- How Bacterial Transformation Works
- How Transduction Works in Viruses (Generalized)
- Bacterial Conjugation- Transfer of the F Plasmid
- Bacterial Conjugation- Transfer of Chromosomal DNA
- Transposons- Shifting Segments of the Genome
- Rolling Circle Mechanisms of Replication
- How Cloning of a Gene is Done
- Construction of a Plasmid Vector
- How & Why cDNA is Made (Complementary DNA)
- DNA hybridization / How DNA is Made
- How the Southern Blot Test Works
- How PCR Works (Polymerase Chain Reaction)
- How Sanger Sequencing of DNA is Done
- What are DNA Microarrays / DNA Chips and How They Work
- How DNA Fingerprinting is Done
- Methyl-directed Mismatch Repair: DNA Repair Mechanism
- Holliday Model: Genetic Exchange between Homologous Chromosomes
- Simple Transposition: Movement of Transposons of DNA
- How FISH is Done (Fluorescence In Situ Hybridization)
- How 2D Gel Electrophoresis is Done
- What are Prion Diseases?
- How Genetic Drift Occurs
- How Horizontal Gene Transfer Occurs
- Cell Proliferation Signaling Pathway
- Bidirectional Replication of DNA
- Hershey & Chase Experiment: To prove that DNA is the Genetic Material
- Meselson & Stahl Experiment: Proof that DNA Replication is Semi-Conservative
- DNA Replication Fork
- DNA Replication Fork (2)
- Processing of Gene Information – Prokaryotes versus Eukaryotes
- How Spliceosomes Process RNA
- Restriction Endonucleases: Molecular Scissors
- What are RFLPs? (Restriction Fragment Length Polymorphisms)
- Early Genetic Engineering Experiments
- How Vaccines are Constructed
- The Tryptophan Repressor/Operon: Gene Expression Control
- Combination of Switches – the Lac Operon
- Control of Gene Expression in Eukaryotes
- Transcription Complex and Enhancers in Gene Expression
- Integration and Excision of a Plasmid DNA
- Mechanism of Transposition of DNA Transposons
- The Consequence of Inversion of a Chromosome
- Control of the Cell Cycle (2)
- Slipped-strand Mispairing & Frame-shift Mutation: DNA Mutation Mechanisms
- Using a DNA Microarray / DNA Chip
- More
- Ecology
- Biomes in the World
- Population Growth Patterns: r and K Selected Population
- More
- Carbon Cycle
- Nitrogen Cycle
- Global Warming
- Ozone Layer and it’s Depletion
- Four Seasons of the Year (Mechanism)
- Rainshadow Effect
- El Niño Southern Oscillation
- Global Air Circulation
- Acid Rain and Acid Deposition
- Bioaccumulation and Biomagnification
- Deoxygenation of Water Bodies
- Stages of Population Growth
- Exponential Population Growth
- Evolution
- Misc
Dr. Prodigious 
you dont have any videos about glycosis, krebs, and ETC cycle?
Awesome (: Your videos are super helpful!
CoOL 😀
thanks 😀
thanx alot.very helpful
You guyzz rock ……… couldnt get more help in biology from anyone else ……. 😀
Thanks so much!
Thanks so much! Studying plus animation= TOTAL UNDERSTANDING OF THE LECTURE…
THANK YOU FOR YOUR VIDEO ,REALLY HELPFUL.THANKS A LOT.
very helpful videos, I haven’t understood biology like this! But don’t you have any videos about the central nervous system and the peripheral nervous system?
Thanx alooot
Thanks…….Your video is very helpful foe study.
wow…. this is just awesome…. always wanted something like this which can teach biology with visuals and at one place…..
Great… It is awesome….
oh your videos are just mind blowing……. i m now scoring much better than before and my ranks are among the toppers. thankyou very very very very very very very muuuuuuuch. : )
I like it just I want to put the text in the animation so I can write it …. hope to do it
Thank a lot, very helpfull for me.,,,
ITS VERY USEFULL THANK YOU VERY MUCH
Thanks a lot !
Keep it up
I’ve been using these as supplementary material to study for the mcat. They’re incredibly helpful– can’t thank you enough!!
LOVE THIS THANK YOU
thanks to u now I get better in biology..
Keep it up!