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B5: Enzymes

Quiz by Oxford Revise Combined Science

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17 questions
Show answers
  • Q1
    What is the name for protein molecules that catalyse specific reactions in organisms?
    Users enter free text
    Type an Answer
    60s
  • Q2
    What does catalyse mean?
    speed up a reaction
    stop a reaction
    cause a reaction
    slow down a reaction
    60s
  • Q3
    Each enzyme only catalyses a specific reaction. What is the name of specifically shaped complementary region of an enzyme?
    Users re-arrange answers into correct order
    Jumble
    60s
  • Q4
    Describe the function of amylase.
    to break down proteins into amino acids
    to break down starch into glucose
    to break down starch into amino acids
    to break down fats into fatty acids and glycerol
    60s
  • Q5
    Which of these organs DO NOT produce amylase?
    stomach
    pancreas
    salivary glands
    small intestine
    60s
  • Q6
    Describe the function of proteases.
    to break down fats into fatty acids and glycerol
    to break down proteins into amino acids
    to break down starch into glucose
    to break down starch into amino acids
    60s
  • Q7
    Which of these organs DO NOT produce protease enzymes?
    pancreas
    salivary glands
    stomach
    small intestine
    60s
  • Q8
    Describe the function of lipases.
    to break down proteins into amino acids
    to break down lipids into fatty acids and glucose
    to break down starch into glucose
    to break down lipids into fatty acids and glycerol
    60s
  • Q9
    Where are lipase enzymes produced?
    stomach & pancreas
    pancreas & small intestine
    small intestine & stomach
    stomach & salivary glands
    60s
  • Q10
    What of these is NOT a factor that affects the rate of activity of an enzyme?
    pH
    concentration of enzyme
    level of blood
    temperature
    60s
  • Q11
    When the shape of an enzyme’s active site is changed by high temperatures or an extreme pH, so it can no longer bind with the substrate it is said to be?
    destroyed
    deconstructed
    denatured
    killed
    60s
  • Q12
    When an enzyme is in its optimum pH and temperature conditions what happens to its rate of reaction?
    it stays the same
    it speeds up
    it is at its highest rate
    it slows down
    60s
  • Q13
    When an enzyme is at a temperature much higher than its optimum, what happens to the enzyme?
    nothing
    the rate of reaction increases
    its rate of reaction decreases
    the enzyme denatures and reaction stops
    60s
  • Q14
    When an enzyme is at a pH very different to its optimum, what happens to the enzyme?
    nothing
    its rate of reaction decreases
    the enzyme denatures and reaction stops
    the rate of reaction increases
    60s
  • Q15
    When an enzyme is at a temperature much lower than its optimum, what happens to the enzyme?
    its rate of reaction decreases
    nothing
    the enzyme denatures and reaction stops
    the rate of reaction increases
    60s

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