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Whole A-Level Biology Course
Section 1. Part 1a- Biological Molecules
Introduction to biological molecules (4:03)
Carbohydrates (monosaccharides, disaccharides and polysaccharides) (5:40)
Lipids (6:52)
Proteins (5:37)
Section 1. Part 1b- Enzyme
Enzyme action (3:01)
Factors affecting enzyme action (7:03)
Enzyme inhibition (2:49)
Section 1. Part 2- Nucleic acid
Structure of RNA and DNA (8:02)
DNA replication (4:14)
Energy and ATP (4:00)
Water and it's functions (4:04)
Section 2. Part 3a- Methods of studying cells
Methods of studying cells
The electron microscope
Microscopic measurements and calculations
Section 2. Part 3b- Cell structure
Eukaryotic cell structure
Cell specialisation and organisation
Prokaryotic cells and viruses
Section 2. Part 3c- Cell cycle
Mitosis
The cell cycle
Section 2. Part 4- Transport across cell membranes
Structure of the cell surface membrane
Diffusion
Osmosis
Active Transport
Co-transport and absoprtion of glucose in the ileum
Section 2. Part 5- Cell recognition and immune system
Defence mechanisms
Phagocytosis (2:58)
T lymphocytes and cell mediated immunity (4:10)
B lymphocytes and humoral immunity (3:18)
Antibodies (6:01)
Vaccination (3:30)
Human immunodeficiency virus (HIV) (3:33)
Section 3. Part 6a- Organisms exchange substances with their environment
Exchange between organisms and their environment
Gas excahnge in single-celled organisms and insects
Gas exchange in fish
Section 3. Part 6b- Gas exchange in plants
Gas exchange in the leaf
Limiting water loss
Experiment
Section 3. Part 6c- Gas exchange in human
Structure of the human gas-exchange system
The mechanism of breathing
Exchange of gases in the lungs
Section 3. Part 6d- Digestion
Enzymes and digestion
Absoprtion of the products of digestion
Section 3. Part 7a- Oxygen transport (haemoglobin)
Haemoglobin
Transport of oxygen by haemoglobin
Section 3. Part 7b- The circulatory system
Circulatory system of a mammal
The structure of the heart
The cardiac cycle
Blood vessels and their functions
Section 3. Part 7c- Transport in plants
Transport of water in the xylem
Transport of organic molecules in the phloem
Investigating transport in plants
Section 4. Part 8- DNA, genes and protein synthesis
Genes and the triplet code
DNA and chromosomes
The structure of ribonucleic acid
Protein synthesis- transcription and splicing
Protein synthesis- translation
Section 4. Part 9- Genetic diversity
Mutations
Meiosis and genetic adaptation
Genetic diversity and adaptation
Types of selection
Section 4. Part 10- Biodiversity
Species and taxonomy
Diversity within a community
Species diversity and human activity
Investigating diversity
Quantitative investigations of variations
Section 5. Part 11- Photosynthesis
Overview of photosynthesis
The light-dependent reaction
The light-independent reaction
Section 5. Part 12- Respiration
Glycolysis
Link reaction and Krebs cycle
Oxidative phosphorylation
Anaerobic respiration
Section 5. Part 13- Energy and ecosystems
Food chains and energy transfer
Energy transfer and productivity
Nutrient cycles
Use of natural and artificial fertilisers
Environmental issues concerning use of nitrogen-containing fertilisers
Section 6. Part 14- Response to stimuli
Survival and response
Plant growth factors
A reflex arc
Receptors
Control of heart rate
Section 6. Part 15- Nervous coordination and muscles
Neurones and nervous coordination
The nerve impulse
Passage of an action potential
Speed of the nerve impulse
Structure and function of synapses
Transmission across a synpase
Structure of skeletal muscle
Contraction of skeletal muscle
Section 6. Part 16a- Hemoestasis (Blood glucose)
Principles of homeostasis
Feedback mechanisms
Hormones and the regulation of blood glucose concentration
Diabetes and it's control
Section 6. Part 16b- Homeostasis (Water)
Control of blood water potential -structural of the nephron
Role of nephron in osmoregulation
The role of hormones in osmoregulation
Section 7. Part 17- Inherited change
Studying inheritance
Monohybrid inheritance
Probability and genetic crosses
Dihybrid inheritance
Codominance and multiple alleles
Sex-linkage
Autosomal linkage
Epistasis
The chi-sqaured test
Section 7. Part 18- Populations and evolution
Population genetics
Variation in phenotype
Natural selection
Effects of different forms of selection on evolution
Isolation and speciation
Section 7. Part 19- Populations in ecosystems
Populations in ecosystems
Variation in population size
Competition
Predation
Investigating populations
Succession
Conservation of habitats
Section 8. Part 20- Gene expression
Gene mutations
Stem cells and totipotency
Regulation of transcription and translation
Epigenetic control of gene expression
Gene expression and cancer
Genome projects
Section 8. Part 21- Recombinant DNA technology
Producing DNA fragments
In vivo gene cloning- the use of vectors
In vitro gene cloning- the polymerase chain reaction
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Exchange between organisms and their environment
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