GCSE Biology Edexcel - Topic 5 Practice Exam With Complete Verified Questions And Answers.

a state of complete physical, mental, and social well-being and not merely the absence of disease or infirmity - correct answer Define health A disease that can be passed from one person to another - correct answer Define communicable disease A disease which cannot be passed from one person to another - correct answer Define non-communicable disease The common cold - correct answer Give an example of a communicable disease Asthma, cancer and coronary heart disease - correct answer Give examples of non-communicable diseases The presence of one disease, as your immune system is impaired so other pathogens are more able to cause disease, barriers may also be damaged - correct answer What can lead to increased susceptibility to diseases and why? Having HIV can leave you at risk to many other opportunistic infections - correct answer What is an example of a disease which can lead to increased susceptibility? A disease causing organism - correct answer Define pathogen Direct contact, water or air - correct answer What are the three ways which pathogens can infect plants/animals? Very small, smaller than cells and bacteria - correct answer How big are viruses? Small, but bigger than viruses - correct answer How big are bacteria? Binary fission - correct answer What is the process of bacteria dividing quickly called? Toxins - correct answer What do bacteria produce? Either single celled or have a body of hyphae (thread-like structures) - correct answer How big are fungi? Some are parasitic - correct answer What is the nature of protists? Cholera - correct answer What disease is caused by vibrio cholerae? Tuberculosis - correct answer What disease is caused by mycobacterium tuberculosis? Chalara ash dieback - correct answer What disease is caused by hympenoscyphus fraxineus? Malaria - correct answer What disease is caused by plasmodium falciparum? HIV - correct answer What disease is caused by human immunodeficiency virus? Helicobacter - correct answer What disease is caused by helicobacter pylori? Ebola - correct answer What disease is caused by B. ebolavirus? Bacteria - correct answer What type of pathogen is vibrio cholerae? Bacteria - correct answer What type of pathogen is mycobacterium tuberculosis? Fungi - correct answer What type of pathogen is hymenoscyphus fraxineus? Protist - correct answer What type of pathogen is plasmodium falciparum? Virus - correct answer What type of pathogen is Human Immunodeficiency Virus? Bacteria - correct answer What type of pathogen is helicobacter pylori? Virus - correct answer What type of pathogen is B. ebolavirus? diarrhoea - correct answer What are the symptoms of cholera? Coughing and lung damage - correct answer What are the symptoms of tuberculosis? Leaf loss and bark lesions - correct answer What are the symptoms of chalara ash dieback? Recurrent fevers and damage to blood and liver - correct answer What are the symptoms of malaria? Flu like symptoms, destroys white blood cells, leads to AIDS - correct answer What are the effects of HIV? Can lead to stomach ulcers - correct answer What are the effects of Helicobacter? Hemorrhagic fever, fever with sever bleeding - correct answer What are the symptoms of Ebola? Water - correct answer How is cholera spread? airborne - correct answer How is tuberculosis spread? Air through wind - correct answer How is chalara ash dieback spread? Animal vector - mosquito - correct answer How is malaria spread? Bodily fluids - correct answer How is HIV spread? Oral transmission - correct answer How is helicobacter spread? Bodily fluids - correct answer How is Ebola spread? Improving hygiene, reducing contact, removing vectors, vaccination - correct answer What four steps can be taken to limit the spread of pathogens? 1. Injects DNA/RNA into host cell 2. Hijacks cellular machinery 3. Cell copies viral DNA or RNA 4. Cells lyses, releasing virus 5. Infects other cells and damages cells - correct answer Describe the lytic pathway 1. Attachment