OCR biology- B2 OCR 21st century science B2 (Keeping Healthy) quiz. 3.5 / 5 based on 7 ratings ? BiologyGCSEOCR Created by: furuba fanCreated on: 15-05-11 16:05 Put these microorganisms in order of size (smallest -biggest): fungus virus, bacterium virus, bacterium, fungus 1 of 16 What is the process of ingesting microoragnisms by white blood cells? Phagocytosis 2 of 16 How fast can bacteria reproduce? Every 20 minutes 3 of 16 Why isn't there a vaccine against common colds? ecause they have a high mutation rate so there ism 4 of 16 What is the immune system? Parts of your body which fight off infections 5 of 16 What do vaccines contain? Weak/inactive versions of the disease. 6 of 16 Does antibiotics CAUSE thrush? False 7 of 16 What does antibiotics not kill? Virus 8 of 16 What is the marker on a pathogen called? Antigen 9 of 16 How do white blood cells react to a foreign microorganisms? Starts producing antibodies to stick onto the microorganism 10 of 16 What is herd immunity? When almost everyone in the population is vaccinated to prevent an outbreak of disease. 11 of 16 What would NOT be a feature in a reliable study? Small sample size 12 of 16 What is NOT the right condition for bacteria to grow? Sunlight 13 of 16 What is a coronary artery? Blood vessel that supplies the heart cells 14 of 16 What happens in a heart attack? Some heart muscle is starved of oxygen and dies 15 of 16 What are infections caused by? Microorganisms 16 of 16
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