OCR-A Biology


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· Practical skills assessed in a written examination


· Practical skills assessed in the practical endorsement

· Cell structure


· Biological molecules:

Monomers and Polymers | Video |

Water | Video |

Monosaccharides, disaccharides | Video |

α-glucose and β–glucose and their polysaccharides, glycogen, starch and cellulose | Video |

Tests for reducing sugars, non-reducing sugars and starch | Video |

Lipids | Video 1 | Video 2 |

Amino Acids, dipeptides and polypeptides | Video |

Protein structure | Video |


· Nucleotides and nucleic acids


· EnzymesBiological membrane


· Cell division, cell diversity and cellular organisation


· Exchange surfaces:

Gas exchange in fish gills | Video |


· Transport in animals:

The Human heart | Video |


· Transport in plants


· Communicable diseases, disease prevention and the immune system


· Biodiversity


· Classification and evolution

· Communication and homeostasis


· Excretion as an example of homeostatic control


· Neuronal communication


· Hormonal communication


· Plant and animal responses


· Photosynthesis:

Photosynthesis - light dependent | Video |

Photosynthesis - light independent | Video |


· Respiration

· Cellular control


· Patterns of inheritance


· Manipulating genomes:

PCR | Video |


· Cloning and biotechnology:

Genetic fingerprinting | Video 1 | Video 2 |


· Cloning and biotechnology


· Ecosystems


· Populations and sustainability


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Somalingam A. (Cobham, GB)
Very useful

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JG (Wolverhampton, GB)
Great Resource

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www.tracyhartshornscience (Prestatyn, GB)
Useful resources

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Anonymous (Walsall, GB)

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