Cards (18)

  • What are viruses considered to be?
    Organisms
  • How do viruses reproduce?
    By using another organism's cell machinery
  • What happens when a virus bursts a cell?
    New viruses find new cells to infect
  • Why do viruses make us feel ill?
    They damage our bodies during infection
  • What are three examples of viral diseases mentioned?
    • Measles
    • HIV
    • Tobacco mosaic virus
  • How is the measles virus spread?
    By droplets from coughing or sneezing
  • What are common symptoms of measles?
    Red rash and fever
  • Why is measles rare in the UK?
    Most people are vaccinated against it
  • How is HIV primarily spread?
    Through sexual contact and bodily fluids
  • What does HIV stand for?
    Human immunodeficiency virus
  • What happens when someone first catches HIV?
    They may experience flu-like symptoms
  • What is AIDS?
    A syndrome where the immune system fails
  • How do antiretroviral drugs help HIV patients?
    They prevent the virus from replicating
  • What does the tobacco mosaic virus affect?
    Certain plant species like tobacco
  • Why is it called the tobacco mosaic virus?
    It causes mosaic patterns on leaves
  • What is the impact of tobacco mosaic virus on plants?
    It hinders photosynthesis and growth
  • What are the main characteristics of viruses?
    • Not cells and not living
    • About 10,000 times smaller than animal cells
    • Cannot reproduce independently
    • Require a host cell to replicate
  • What are the consequences of viral infections on the human body?
    • Damage to cells
    • Symptoms like fever and rash
    • Potentially serious health issues
    • Can lead to chronic conditions like AIDS