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Organisation (AQA GCSE)

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  • What happens to an enzyme in high temperatures?
    It changes
    The active site denatures
    It dies
  • What is an enzyme?
    A lock and key
    A carbohydrate
    A biological catalyst
    An active site
  • What is the function of bile?
    It coats the small intestine to improve absorption
    It breaks down lipids into fatty acids and glycerol
    It emulsifies fats and neutralises stomach acid pH
  • What is the function of the liver?
    Stores carbohydrates
    Digests food
    Stores lipase
    Produces bile
  • Which of these has walls only one cell thick?
    Vein
    Capillary
    Artery
  • What colour does a positive biuret test go?
    Blue
    Pink
    Violet purple
  • What colour does a positive iodine test go?
    Yellow
    Red
    Black
    Green
  • What is the function of white blood cells?
    To defend against pathogens
    The liquid portion of the blood
    To clot the blood
    Carry oxygen
  • Which blood vessel carries deoxygenated blood from body to heart?
    Vena cava
    Aorta
    Pulmonary Artery
    Pulmonary Vein
  • What is the function of red blood cells?
    The liquid portion of the blood
    To cloth the blood
    To carry oxygen
    To defend against pathogens
  • Which blood vessel carries oxygenated blood from lungs to heart?
    Aorta
    Pulmonary artery
    Vena cava
    Pulmonary vein
  • What is the function of platelets?
    Fight disease
    Clotting
    Transport
  • What does Benedict's test for?
    Lipids
    Sugars
    Proteins
  • What does biuret test for?
    The presence of starch
    The presence of lipids
    The presence of proteins
  • What colour does a positive Benedict's test go?
    Brick red
    Black
    Purple
    White
  • What are the upper chambers of the heart called?
    Atria
    Ventricles