Designed for the new specification AQA GCSE course but can be modified for other exam boards. 24 slides covering Discovery and development of drugs By the end of the powerpoint students would have covered: Students should be able to describe the process of discovery and development of potential new medicines, including preclinical and clinical testing. Traditionally drugs were extracted from plants and microorganisms. • The heart drug digitalis originates from foxgloves. • The painkiller aspirin originates from willow. • Penicillin was discovered by Alexander Fleming from the Penicillium mould. Most new drugs are synthesised by chemists in the pharmaceutical industry. However, the starting point may still be a chemical extracted from a plant. New medical drugs have to be tested and trialled before being used to check that they are safe and effective. New drugs are extensively tested for toxicity, efficacy and dose. Preclinical testing is done in a laboratory using cells, tissues and live animals. Clinical trials use healthy volunteers and patients. • Very low doses of the drug are given at the start of the clinical trial. • If the drug is found to be safe, further clinical trials are carried out to find the optimum dose for the drug. • In double blind trials, some patients are given a placebo.

Designed for the new specification AQA GCSE course but can be modified for other exam boards. 14 slides covering selective breeding By the end of the powerpoint students would have covered: 4.6.2.3 from the specification.

Designed for the new specification AQA GCSE course but can be modified for other exam boards. 12 slides covering Active transport . By the end of the powerpoint students would have covered: Active transport moves substances from a more dilute solution to a more concentrated solution (against a concentration gradient). This requires energy from respiration. Active transport allows mineral ions to be absorbed into plant root hairs from very dilute solutions in the soil. Plants require ions for healthy growth. It also allows sugar molecules to be absorbed from lower concentrations in the gut into the blood which has a higher sugar concentration. Sugar molecules are used for cell respiration. Students should be able to: describe how substances are transported into and out of cells by diffusion, osmosis and active transport explain the differences between the three processes.

Designed for the new specification International A-level edexcel course but can be modified for other exam boards. 35 slides coveringThe Structure of Neurones By the end of the powerpoint students would have covered: 8.1 know the structure and function of sensory, relay and motor neurones, including Schwann cells and myelination Powerpoint contains exam questions.

Designed for the new specification International A-level edexcel course but can be modified for other exam boards. 17 slides coveringThe Structure of Neurones By the end of the powerpoint students would have covered: 8.5 understand the role of myelination in saltatory conduction. Powerpoint contains exam questions.

Designed for the new specification International A-level edexcel course but can be modified for other exam boards. 26 slides coveringThe Structure of Neurones By the end of the powerpoint students would have covered: 8.6 (i) know the structure and function of synapses in nerve impulse transmission, including the role of neurotransmitters and acetylcholine. Powerpoint contains exam questions.

Designed for the new specification International A-level edexcel course but can be modified for other exam boards. 22 slides covering Lipids By the end of the powerpoint students would have covered: State the importance of lipids. Describe the structure of Triglycerides. Describe the differences between saturated and unsaturated fatty acids. Includes two practical/demo activities

Designed for the new specification International A-level edexcel course but can be modified for other exam boards. 21 slides covering Fertilisation in plants By the end of the powerpoint students would have covered: 3.13 know the process of fertilisation in flowering plants, starting with the growth of a pollen tube and ending with the fusion of nuclei. Powerpoint contains exam questions.

Designed for the new specification International A-level edexcel course but can be modified for other exam boards. 34 slides coveringThe Structure of Neurones By the end of the powerpoint students would have covered: 8.4 understand how a nerve impulse (action potential) is conducted along an axon, including changes in membrane permeability to sodium and potassium ions Powerpoint contains exam questions.