Biology 6 markers edexcel
WebEdexcel Past Papers for iprogress, igces, gcse and ial examinations solved by experienced teachers, showing clear solutions step by step WebTranscription is the process by which a section of DNA acts as a template for the creation of a complementary mRNA strand. mRNA is needed for the creation of a polypeptide. An enzyme called DNA helicase binds to a complementary start codon on the DNA and brakes the H bonds causing the DNA to unwind, exposing its bases. Each exposed DNA base ...
Biology 6 markers edexcel
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Webculminate in a 20 mark extended open response question. Our command words are defined in our specification, please see page 95, and will remain ... Pearson Edexcel A level Geography Topic 6 Exemplars 7 (c) Pearson Education Ltd 2024 Exemplar B Climate warming is the slow increase in Earth’s overall atmospheric temperatures. This is WebOne of the key neurotransmitters used throughout the nervous system is acetylcholine (ACh) Synapses that use the neurotransmitter ACh are known as cholinergic synapses. The arrival of an action potential at the presynaptic membrane causes depolarisation of the membrane. This stimulates voltage-gated calcium ion channel proteins to open.
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