AQA AS Biology Unit 1 1.0 / 5 based on 1 rating ? BiologyGeneralASAQA Created by: trybreathingCreated on: 14-01-14 12:12 State 4 symptoms of pulmonary fibrosis. Chronic dry cough, Shortness of breath, pain/discomfort in chest. weakness/fatigue. 1 of 6 Before cell fractionation, why is the suspension kept ice cold through the whole process of hydrogensis? To reduce enzyme activity (that may cause damage to cells) 2 of 6 Name 4 substances found in oral rehydration solutions. glucose, sodium ions, potassium ions, choride ions, citrade ion 3 of 6 Before carrying out cell fractionation why is the resulting suspension filtered? Removes whole cells and debris. 4 of 6 Why is a booster dose of vaccination required for long term immunity? Ensures memory cells are produced. 5 of 6 What is the molecular formula for lactose? C12H22O11 6 of 6
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