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We have a collection of videos and experiments that are suitable for the different levels of Biology: Junior Certificate Science, Experiments for Biology, Tests for different Biochemicals, Biology for Key Stage 3, IGCSE Biology, AP Biology and College Biology, AP Biology Labs, Cell Biology, Molecular Biology, and Immunology.

Junior Certificate Science Experiments for Biology

Test food for Starch
Test a food for sugar
Test a food for fat
Test a food for protein
Convert Chemical energy in food into heat energy
The action of enzyme amylase
CO2 levels in inhaled and exhaled air

To show that starch is produced in plants
Conditions Necessary for germination
Phototropism: To Show the Growth Response of a Plant to Light

Testing for Biochemicals

Biuret Test for Protein
Benedict Test for Reducing Sugars
Benedict Test for Non-Reducing Sugars
Indophenol Test for Vitamin C
Iodine Test for Starch
Test for starch in leaf
Alcohol Emulsion Test
Lipids (Fats and Oils) Test
Amylase Iodine Test
Amylase Benedict Test

Biology for Key Stage 3

Food Chains & Food Webs Food Chain
Food Webs
Energy transfer in chains and webs
Energy from food used for respiration
Energy Pyramids
Muscles Sensitivity
Muscles and Movement
Muscle Response
PlantsPlants and Light
Plants and Responses
Growing Plants and Fair Test
Growing Water Cress (fair test)
Warming Up (fair test)
Red Squirrel Population
MicrobesMicrobes and washing hands
Size of Microbes
Growth rate of microbes
Prevention of infection during operations
Microbes sterilization - Control of infection in operating theatre
Microbes and spots on your face
Plant GrowthPlant growth rates
Plant growth and photosynthesis
Plant growth results
Conditions For Growth in Plants
Plant NutrientsPlant nutrients and CO2
Effect of CO2 concentration on plant biomass
Oxygen production by photosynthesis
Plant stress
Human Nutrition Human DigestionSaliva and gastric juices
Digestion after the stomach
Digestion - breaking down complex molecules
Feeding Habits
Energy used by knotweed
Energy in food
RespirationRespiration Products
Respiration equation
Respiration and lack of oxygen
Respiration in Cells
Respiration - Efficiency of horses
Cell StructuresOnion cells and Cheek cells
Cells - Model of animal cell
Cells - Plant cell structure
Function of the Cell membrane
Cell GrowthCells and growth
Cells and Reproduction
Cell growth rate
Cells - Yeast growth and the nucleus
Growing skin cells
Plant ReproductionReproduction - fertilisation
Reproduction in plants
Self and cross pollination
Reproduction - pollination of apple trees
Reproduction pollen tubes in plants
Seeds DispersalWind, Water, Animals, Self Asexual Reproduction

IGCSE Biology

The following lessons cover some of the topics for the Edexcel IGCSE Biology

The Nature and Variety of Living Organism
Characteristics of living organism
Variety of living organism
Pathogens: fungi, bacteria, protoctists or viruses.

Cell Structure
Levels of Organisation
Cell structures, including the nucleus, cytoplasm, cell membrane, cell wall, chloroplast and vacuole
Describe the functions of the nucleus, cytoplasm, cell membrane, cell wall, chloroplast and vacuole
Describe the differences between plant and animal cells.

Biological Molecules
The chemical elements present in carbohydrates, proteins and lipids (fats and oils)
Describe the structure of carbohydrates, proteins and lipids as large molecules made up from smaller basic units: starch and glycogen from simple sugar; protein from amino acids; lipid from fatty acids and glycerol
Describe the tests for glucose and starch

The role of enzymes as biological catalysts in metabolic reactions
How the functioning of enzymes can be affected by changes in temperature
How the functioning of enzymes can be affected by changes in pH

Movement of substances into and out of cell
Definitions of diffusion, osmosis and active transport
The movement of substances into and out of cells can be by diffusion, osmosis
and active transport

The importance in plants of turgid cells as a means of support
The factors that affect the rate of movement of substances into and out of cells
to include the effects of surface area to volume ratio, temperature and concentration

Nutrition in Flowering Plants
Photosynthesis and understand its importance in the conversion of light energy to chemical energy
The word equation and the balanced chemical symbol equation for photosynthesis
Factors affecting the rate of photosynthesis
How the structure of the leaf is adapted for photosynthesis

Plants require mineral ions for growth, magnesium ions for chlorophyll and nitrate ions for amino acids

Nutrition in Humans
A balanced diet should include appropriate proportions of
carbohydrate, protein, lipid, vitamins, minerals, water and dietary fibre
Sources and functions of carbohydrate, protein, lipid (fats and oils), vitamins A, C and D, and the mineral ions calcium and iron, water and dietary fibre as components of the diet

The process of respiration releases energy in living organisms
Describe the differences between aerobic and anaerobic respiration
The word equation and the balanced chemical symbol equation for aerobic
respiration in living organisms
The word equation for anaerobic respiration in plants and in animals

Human Respiration
Thorax structure
Alveoli adaptations
Biological effects of smoking

Diffusion in unicellular organisms
Transport systems in multicellular organisms

Composition of Blood
Role of Plasma
Red Blood Cells


The Heart
Describe the structure of the heart and how it functions
The heart rate changes during exercise and under the influence of adrenaline
Describe the structure of arteries, veins and capillaries and understand their roles
The general plan of the circulation system to include the blood vessels to and from
the heart, the lungs, the liver and the kidneys.

Coordination and Response in Flowering plants
Understand that plants respond to stimuli
Describe the geotropic responses of roots and stems
Describe positive phototropism of stem

Reproduction in Flowering Plants
Describe the structures of an insect-pollinated and a wind-pollinated flower and explain how each is adapted for pollination
The growth of the pollen tube followed by fertilisation leads to seed and fruit formation

How germinating seeds utilise food reserves until the seedling can carry
out photosynthesis
Plants can reproduce asexually by by natural methods (illustrated by runners) and by artificial methods (illustrated by cuttings)

The Organism in the Environment
Population, community, habitat and ecosystem
Use of quadrats to estimate the population size of an organism in two different
Describe the use of quadrats as a technique for sampling the distribution of organisms in their habitats.

Feeding Relationships
Names given to different trophic levels to include producers, primary, secondary
and tertiary consumers and decomposers

The concepts of food chains, food webs, pyramids of number, pyramids of biomass and pyramids of energy transfer
The transfer of substances and of energy along a food chain
Why only about 10% of energy is transferred from one trophic level to the next

Cycles within Ecosystems
The stages in the water cycle, including evaporation, transpiration,
condensation and precipitation
The stages in the carbon cycle, including respiration, photosynthesis,
decomposition and combustion
The stages in the nitrogen cycle, including the roles of nitrogen fixing bacteria, decomposers, nitrifying bacteria and denitrifying bacteria (specific names of bacteria are not required)

Human influences on the environment
Tthe biological consequences of pollution of air by sulfur dioxide and by carbon
Water vapour, carbon dioxide, nitrous oxide, methane and CFCs are greenhouse
How human activities contribute to greenhouse gases
How an increase in greenhouse gases results in an enhanced greenhouse effect
and that this may lead to global warming and its consequences

The biological consequences of pollution of water by sewage including increases in the number of microorganisms causing depletion of oxygen
Eutrophication can result from leached minerals from fertiliser
The effects of deforestation, including leaching, soil erosion, disturbance of the
water cycle and of the balance in atmospheric oxygen and carbon dioxide

Use of Biological Resources

Food Production
How glasshouses and polythene tunnels can be used to increase the yield of
certain crops
The effects on crop yield of increased carbon dioxide and increased temperature in glasshouses
The use of fertiliser to increase crop yield

Beer Production
The role of bacteria (Lactobacillus) in the production of yoghurt
Industrial fermenter
Fish Farming

Selective Breeding
Genetic Modification
Commercial plant growing
Mammal Cloning
Cloned transgenic animals

AP Biology and College Biology

Biology Introduction
AP Biology Test: A User Guide
The Chemical Basis of Life
Water: A Polar Molecule
The Molecules of Cells
A Tour of the Cell
The Cell Membrane
Cellular Respiration
Mitosis and Meiosis Simulation
Mendelian Genetics
Chromosomal Inheritance
Molecular Biology of the Gene
The Central Dogma: Transcription and Translation
DNA: Transcription and Translation
Gene Control
Natural Selection
Hardy-Weinberg Equilibrium
The Origin of Species
Semester 1 Biology Review
The History of Life
Radiocarbon Dating
Classification of Life
Prokaryotes and Protists
Plant Evolution
Invertebrate Diversity
Vertebrate Diversity
Anatomy and Physiology (Intro)
The Digestive System
The Respiratory System
The Immune System
Thermoregulation, Osmoregulation and Excretion
Endocrine System and Hormones
Reproductive System
Nervous System
The Senses
Plant Structure
Plant Transport
Plant Control
The Biosphere
Behavioral Ecology
Population Ecology
Communities and Ecosystems

AP Biology Labs

AP Biology Labs: Introduction
Lab 1: Diffusion and Osmosis
Lab 2: Enzyme Catalysis
Lab 3: Mitosis and Meiosis
Lab 4: Plant Pigments & Photosynthesis
Lab 5: Cellular Respiration
Lab 6: Molecular Biology
Lab 7: Genetics of Drosophila
Lab 8: Population Genetics
Lab 9: Transpiration
Lab 10: Physiology of the Circulatory System
Lab 11: Animal Behavior
Lab12: Dissolved Oxygen

Cell Biology

Action Potentials
Adhesion Junctions Between Cells
Animal Cell Division
ATP Synthase - A Molecular Turbine
Bacterial Flagellum
Beating Heart Cell
Biosynthetic Secretory Pathway
Breast Cancer Cells
Calcium Signaling
Calcium Wave During Fertilization
cAMP Signaling
Cell Compartments
Chemotaxis of Neutrophils
Citric Acid Cycle
Contact Inhibition
Crawling Actin
Crawling Amoeba
Developing Egg Cells
Drosophila Development
Early Zebrafish Development
G-Protein Signaling
Electron-Transport Chain
Embryonic Origin of Tissues
Embryonic Stem Cells
Endosome Fusion
ER Tubules
Exocytotic Transport
Glucose Uptake
Hair Cells I
Hair Cells II
Intermediate Filaments
Keratocyte Dance
Leukocyte Rolling
Light Harvesting
Listeria Parasites
Membrane Effects in a Red Blood Cell
Membrane Disruption by Detergent
Microtubule Dynamics IN VIVO
Mitochondiral Fission and Fusion
Mitochondrial Protein Import
Mitotic Spindle
Mitotic Spindles in a Fly Embryo
Dynamic Instability of Microtubules
Microtubule and ER Dynamics
Muscle Contraction
Na+ - K+ Pump
Neurite Outgrowth
Neuronal Pathfinding
Nuclear Envelope Assembly
Organelle Movement on Microtubules
p53-DNA Complex
Photosynthetic Reaction Center
Plant Cell Division
Potassium Channel
Protein Translocation
Receptor-Mediated Endocytosis
Sea Urchin Fertilization
Spemann's Organizer
Swimming Eutreptiella
Synaptic Signalling
Tomogram of a Mitochondrion
Transport by Carrier Proteins
Wound Healing

Molecular Biology

Alpha Helix
Aspartate Transcarbamylase
Beta Sheet
Disulfide Bonds
DNA Helicase
DNA Polymerase
DNA Replication
DNA Structure
Enzyme Catalysis
Holliday Junction
Laser Tweezers
Leucine Zipper
Lysozyme Reaction
Lysozyme Structure
Noncovalent Bonds
Oligomeric Proteins
Palmitic Acid
PDB File
Polymerase Chain Reaction (PCR)
Potassium Channel
Proline Kinks
Random Walk
Ribosome Ratchet
RNA Polymerase II
RNA Splicing
RNA Structure
SH2 Domain
TATA Binding Protein
Telomere Replication
Sliding Clamp
Zinc Finger Domain


Activated T Cell
Antigenic Drift
The Complement System
Chemokine Signaling
Cytokine Signaling
Dendritic Cell Migration
DTH Response
Gene Recombination
Germinal Centers
HIV Infection
The Immune Response
Immunological Synapse
Induction of Apoptosis
Innate Recognition of Pathogens
Intracellular Listeria Infection
Killer T Cell
Leukocyte Extravasation
Lipid Rafts
Lymph Node Development
Lymphocyte Homing
Lymphocyte Trafficking
MAP Kinase
MHC Class II Processing
Neutrophil Chase
Pathogen Recognition Receptors
Rolling Adhesion
T Cell Development
T Cell Granule Release
T Cell Killing
TCR-APC Interaction
TCR Signaling
Uptake of Bacteria by Phagocytes
Viral Evasions

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