Our registered address is AQA Devas Street Manchester M15 6EX 19 of 33 June

Our registered address is aqa devas street manchester

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19 of 33 June 2011 Biol5 10 (a) Using DNA in science and technology QuestionMarking guidanceMarkComments10 (a) DNA and classification Structure of DNA Differences in DNA lead to genetic diversity Comparison of DNA base sequences DNA hybridisation Genetic engineering and making useful substances Plasmids The use of recombinant DNA to produce transformed organisms that benefit humans Other uses of DNA Cell cycle and treatment of cancer Gene therapy; Medical diagnosis and the treatment of human disease; The use of DNA probes to screen patients for clinically important genes. 25
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AQA Education (AQA) is a registered charity (number 1073334) and a company limited by guarantee registered in England and Wales (number 3644723). Our registered address is AQA, Devas Street, Manchester M15 6EX. 20 of 33 June 2011 Biol5 10 (b) A cycle is a biological pathway or process in which the end product of one cycle becomes the starting point for the next. Write an essay about cycles in biology QuestionMarking guidanceMarkComments10 (b) Ecological cycles Nutrient cycles Carbon cycle Nitrogen cycle Biochemical cycles Enzyme action Synthesis of ATP from ADP Light-independent reaction The Krebs cycle Physiological and genetic cycles The mechanism of breathing The cardiac cycle The cell cycle Muscle contraction Oestrous cycle 25
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AQA Education (AQA) is a registered charity (number 1073334) and a company limited by guarantee registered in England and Wales (number 3644723). Our registered address is AQA, Devas Street, Manchester M15 6EX. 21 of 33 2010 June Biol5 10 (a) Carbon dioxide may affect organisms directly or indirectly. Describe and explain these effects. QuestionMarking guidanceMarkComments10 (a) Carbon dioxide affects the physiology of organisms Pulmonary ventilation and the mechanism of breathing Light-independent reaction of photosynthesis. Limiting factors Role of chemoreceptors in controlling heart rate The direct effects of increasing carbon dioxide concentration Respiration, photosynthesis and human activity giving rise to short-term fluctuations and long-term change. Yield of crop plants Carbon cycle Indirect effects of increasing carbon dioxide concentration Role of carbon dioxide in producing global warming; Life cycles and number of insect pests; Distribution of animals and plants; Effect of temperature on enzymes; 25
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AQA Education (AQA) is a registered charity (number 1073334) and a company limited by guarantee registered in England and Wales (number 3644723). Our registered address is AQA, Devas Street, Manchester M15 6EX. 22 of 33 2010 June Biol5 10 (b) The causes of disease in humans QuestionMarking guidanceMarkComments10 (b) Pathogens Pathogens include bacteria, viruses and fungi Pathogens cause disease by damaging cells and producing toxins Cholera bacteria produce toxins resulting in diarrhoea Symptoms and transmission of pulmonary tuberculosis Horizontal gene transmission and MRSA Lifestyle Risk factors associated with cancer and coronary heart disease The effects of fibrosis, asthma and
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