Edexcel IAL · A2

Coming soon

Edexcel IAL A2 Biology.

105 lessons · 3 units

WBI14

Unit 4: Energy, Environment, Microbiology and Immunity

A2 Year 13 paper. Covers photosynthesis, ecology, microbiology, and immunology.

51 lessons

Lesson 01
Photosynthesis overview and overall reaction
Coming soon
Lesson 02
ATP, ADP, phosphorylation and hydrolysis
Coming soon
Lesson 03
Light-dependent reactions: chlorophyll excitation and photolysis
Coming soon
Lesson 04
Cyclic and non-cyclic photophosphorylation
Coming soon
Lesson 05
Light-independent reactions and the Calvin cycle
Coming soon
Lesson 06
GALP products and biological molecule synthesis
Coming soon
Lesson 07
Chloroplast structure-function relationships
Coming soon
Lesson 08
Absorption spectra and action spectra
Coming soon
Lesson 09
Chromatography of chloroplast pigments and Rf values
Coming soon
Core Practical
Lesson 10
Core Practical 10: light intensity/wavelength and photosynthesis rate
Coming soon
Core Practical
Lesson 11
Core Practical 10: temperature, carbon dioxide and data evaluation
Coming soon
Lesson 12
GPP, NPP and plant respiration calculations
Coming soon
Lesson 13
Biomass and energy transfer efficiency
Coming soon
Lesson 14
Populations, communities, habitats and ecosystems
Coming soon
Lesson 15
Biotic and abiotic factors controlling distribution
Coming soon
Lesson 16
Niche, distribution and abundance
Coming soon
Core Practical
Lesson 17
Core Practical 11: quadrats, transects and abiotic factors
Coming soon
Lesson 18
Succession and climax communities
Coming soon
Lesson 19
Evidence for climate change and correlation/causation
Coming soon
Lesson 20
Greenhouse effect and anthropogenic climate change
Coming soon
Lesson 21
Carbon cycle and reducing atmospheric carbon dioxide
Coming soon
Lesson 22
Climate models, extrapolation and limitations
Coming soon
Lesson 23
Climate change effects on organisms
Coming soon
Lesson 24
Temperature, enzyme activity and Q10
Coming soon
Core Practical
Lesson 25
Core Practical 12: temperature and organism development
Coming soon
Lesson 26
Evolution through mutation and natural selection
Coming soon
Lesson 27
Isolation, gene flow and speciation
Coming soon
Lesson 28
Bias, evidence and controversial climate conclusions
Coming soon
Lesson 29
Reforestation, biofuels and sustainable resource use
Coming soon
Lesson 30
Culturing microorganisms and aseptic technique
Coming soon
Lesson 31
Measuring microbial growth: cell counts and dilution plating
Coming soon
Lesson 32
Measuring microbial growth: mass and turbidity methods
Coming soon
Lesson 33
Bacterial growth curves and exponential growth constants
Coming soon
Core Practical
Lesson 34
Core Practical 13: microorganism growth in liquid culture
Coming soon
Lesson 35
Bacterial and viral structure comparison
Coming soon
Lesson 36
Ebola, TMV, HIV and lambda phage; lytic and latency
Coming soon
Lesson 37
Tuberculosis and HIV infection of human cells
Coming soon
Lesson 38
Pathogen entry routes and body barriers
Coming soon
Lesson 39
Non-specific immune responses
Coming soon
Lesson 40
Antigens, antibodies, macrophages and antigen-presenting cells
Coming soon
Lesson 41
B cells and T cells in the immune response
Coming soon
Lesson 42
Natural/artificial and active/passive immunity
Coming soon
Lesson 43
Evolutionary race and pathogen evasion
Coming soon
Lesson 44
Bacteriostatic and bactericidal antibiotics
Coming soon
Core Practical
Lesson 45
Core Practical 14: effect of antibiotics on bacteria
Coming soon
Lesson 46
Antibiotic prescribing, HAI and infection-control practice
Coming soon
Lesson 47
Decomposition and carbon recycling
Coming soon
Lesson 48
PCR amplification of DNA
Coming soon
Lesson 49
Gel electrophoresis of DNA fragments
Coming soon
Lesson 50
DNA profiling and genetic relationships
Coming soon
Lesson 51
Time of death: decomposition, succession, entomology and rigor
Coming soon

WBI15

Unit 5: Respiration, Internal Environment, Coordination and Gene Technology

A2 Year 13 paper. Covers respiration, homeostasis, nervous coordination, and biotechnology.

49 lessons

Lesson 52
Aerobic respiration overview and enzyme-controlled steps
Coming soon
Lesson 53
Glycolysis in aerobic and anaerobic respiration
Coming soon
Lesson 54
Link reaction and Krebs cycle
Coming soon
Lesson 55
Oxidative phosphorylation, electron transport and chemiosmosis

WBI16

Unit 6: Practical Skills in Biology II

A2 practical assessment — synoptic investigations and scientific articles.

5 lessons

Lesson 101
Planning investigations and formulating null hypotheses
Coming soon
Lesson 102
Measurement, variables, calibration, safety and ethics
Coming soon
Lesson 103
Statistical tests, graphs and logarithmic data
Coming soon
Lesson 104
Scientific-article strategy and synoptic links

Unit 4: Energy, Environment, Microbiology and Immunity

Photosynthesis overview and overall reaction

ATP, ADP, phosphorylation and hydrolysis

Light-dependent reactions: chlorophyll excitation and photolysis

Cyclic and non-cyclic photophosphorylation

Light-independent reactions and the Calvin cycle

GALP products and biological molecule synthesis

Chloroplast structure-function relationships

Absorption spectra and action spectra

Chromatography of chloroplast pigments and Rf values

Core Practical 10: light intensity/wavelength and photosynthesis rate

Core Practical 10: temperature, carbon dioxide and data evaluation

GPP, NPP and plant respiration calculations

Biomass and energy transfer efficiency

Populations, communities, habitats and ecosystems

Biotic and abiotic factors controlling distribution

Niche, distribution and abundance

Core Practical 11: quadrats, transects and abiotic factors

Succession and climax communities

Evidence for climate change and correlation/causation

Greenhouse effect and anthropogenic climate change

Carbon cycle and reducing atmospheric carbon dioxide

Climate models, extrapolation and limitations

Climate change effects on organisms

Temperature, enzyme activity and Q10

Core Practical 12: temperature and organism development

Evolution through mutation and natural selection

Isolation, gene flow and speciation

Bias, evidence and controversial climate conclusions

Reforestation, biofuels and sustainable resource use

Culturing microorganisms and aseptic technique

Measuring microbial growth: cell counts and dilution plating

Measuring microbial growth: mass and turbidity methods

Bacterial growth curves and exponential growth constants

Core Practical 13: microorganism growth in liquid culture

Bacterial and viral structure comparison

Ebola, TMV, HIV and lambda phage; lytic and latency

Tuberculosis and HIV infection of human cells

Pathogen entry routes and body barriers

Non-specific immune responses

Antigens, antibodies, macrophages and antigen-presenting cells

B cells and T cells in the immune response

Natural/artificial and active/passive immunity

Evolutionary race and pathogen evasion

Bacteriostatic and bactericidal antibiotics

Core Practical 14: effect of antibiotics on bacteria

Antibiotic prescribing, HAI and infection-control practice

Decomposition and carbon recycling

PCR amplification of DNA

Gel electrophoresis of DNA fragments

DNA profiling and genetic relationships

Time of death: decomposition, succession, entomology and rigor

Unit 5: Respiration, Internal Environment, Coordination and Gene Technology

Aerobic respiration overview and enzyme-controlled steps

Glycolysis in aerobic and anaerobic respiration

Link reaction and Krebs cycle

Oxidative phosphorylation, electron transport and chemiosmosis

Unit 6: Practical Skills in Biology II

Planning investigations and formulating null hypotheses

Measurement, variables, calibration, safety and ethics

Statistical tests, graphs and logarithmic data

Scientific-article strategy and synoptic links

Lactate after anaerobic respiration

Respiratory quotient

Core Practical 15: redox indicator and yeast respiration

Core Practical 16: respirometer, respiration rate and RQ

Movement: muscles, tendons, skeleton and ligaments

Skeletal muscle fibres and fast/slow twitch fibres

Sliding filament theory

Cardiac muscle and electrical coordination of the heartbeat

ECGs and abnormal heart rhythm diagnosis

Cardiac output calculations

Ventilation, cardiac output and medulla control centres

Adrenaline and the fight-or-flight response

Core Practical 17: spirometer traces and exercise data

Negative and positive feedback control

Homeostasis, exercise and thermoregulation

Mammalian kidney gross and microscopic structure

Urea production and ultrafiltration

Selective reabsorption in the proximal tubule