AQA GCSE COMBINED SCIENCE
TRILOGY HIGHER TIER CHEMISTRY
PAPER 2H 5
◉ What are communicable diseases caused by? Answer: Pathogens
(microorganisms) which include bacteria, viruses, fungi and protists.
◉ How do Bacteria make you feel ill Answer: Produce toxins
◉ How do viruses make you ill? Answer: Live and reproduce inside
your cells, causing cell damage
◉ Name four ways in which the spread of disease can be prevented
Answer: Simple Hygiene, Destroying Vectors, Vaccination and
Isolation
◉ Measles Virus Answer: Droplet infection.
Causes fever and a rash
Isolation and Vaccination
◉ HIV Answer: Flu-like illness
Attacks body's immune cells
, AIDS occurs when the system become so damaged it can't deal with
cancers or infections/
◉ Tobacco Mosaic Virus Answer: Spread by contact and vectors
Damages leaves, reduces photosynthesis. No treatment.
Spread controlled by field hygiene and pest control.
◉ Rose Black Spot Answer: Spread by wind and water.
Damages leaves so they drop off, affecting photosynthesis.
Spread controlled by removing affected leaves and chemical sprays.
◉ Malaria Answer: Parasitic Protists spread by female mosquitos.
Damages blood and liver cells, causes fever and shaking.
Prevent vectors from breeding, mosquito nets.
◉ How do white blood cells defend against pathogens? Answer:
Ingest and destroy them or by making antibodies and antitoxins.
◉ What is vaccination? Answer: Introducing dead of inactive small
amounts of pathogens into your body to stimulate white blood cells
to produce antibodies.
◉ What are new drugs tested for? Answer: Efficacy, Toxicity, Dosage
TRILOGY HIGHER TIER CHEMISTRY
PAPER 2H 5
◉ What are communicable diseases caused by? Answer: Pathogens
(microorganisms) which include bacteria, viruses, fungi and protists.
◉ How do Bacteria make you feel ill Answer: Produce toxins
◉ How do viruses make you ill? Answer: Live and reproduce inside
your cells, causing cell damage
◉ Name four ways in which the spread of disease can be prevented
Answer: Simple Hygiene, Destroying Vectors, Vaccination and
Isolation
◉ Measles Virus Answer: Droplet infection.
Causes fever and a rash
Isolation and Vaccination
◉ HIV Answer: Flu-like illness
Attacks body's immune cells
, AIDS occurs when the system become so damaged it can't deal with
cancers or infections/
◉ Tobacco Mosaic Virus Answer: Spread by contact and vectors
Damages leaves, reduces photosynthesis. No treatment.
Spread controlled by field hygiene and pest control.
◉ Rose Black Spot Answer: Spread by wind and water.
Damages leaves so they drop off, affecting photosynthesis.
Spread controlled by removing affected leaves and chemical sprays.
◉ Malaria Answer: Parasitic Protists spread by female mosquitos.
Damages blood and liver cells, causes fever and shaking.
Prevent vectors from breeding, mosquito nets.
◉ How do white blood cells defend against pathogens? Answer:
Ingest and destroy them or by making antibodies and antitoxins.
◉ What is vaccination? Answer: Introducing dead of inactive small
amounts of pathogens into your body to stimulate white blood cells
to produce antibodies.
◉ What are new drugs tested for? Answer: Efficacy, Toxicity, Dosage
