Viral diseases (AQA GCSE Biology): Flashcards
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Practise the cards
15 cards from this deck
What is a pathogen?
What is a pathogen?
A microorganism that can make you ill
Virus structure components
Virus structure components
Genetic material (DNA/RNA) + protein & lipid coat
Where viruses can reproduce
Where viruses can reproduce
Inside living cells (host cells)
How quickly do viruses reproduce?
How quickly do viruses reproduce?
Very quickly once inside the body
Viral life cycle: Entry step
Viral life cycle: Entry step
Virus enters cell through cell membrane
Viral life cycle: Production step
Viral life cycle: Production step
Cell makes more viral DNA/RNA and proteins
Viral life cycle: Release step
Viral life cycle: Release step
New viruses leave cell or burst it open
Why do viruses cause illness?
Why do viruses cause illness?
They damage or destroy host cells
How does measles spread?
How does measles spread?
Droplets when infected people sneeze/cough
Measles symptoms
Measles symptoms
High fever and red skin rash
Measles prevention method
Measles prevention method
Vaccination
How does HIV spread?
How does HIV spread?
Sexual contact, sharing needles, infected blood/fluids
What does HIV attack in the body?
What does HIV attack in the body?
Immune system cells
What plants can TMV infect?
What plants can TMV infect?
Tobacco, tomatoes, and many other species
What are the symptoms of TMV in plants?
What are the symptoms of TMV in plants?
Mottled/mosaic pattern, discoloured leaves