Biology

9th -

12thgrade

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Enzymes

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  • 1. Multiple Choice
    1 minute
    1 pt
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     Many of the proteins in the human body are enzymes that catalyze chemical reactions. What is the relationship between enzymes and activation energy?
    chymotrypsin
    pepsin
    cholinesterase
    papain
  • 2. Multiple Choice
    1 minute
    1 pt
    Some bacteria live in hot springs. Their cells contain enzymes that function best at temperatures of 70 °C or higher. At the temperature of 50 °C, how will the enzymes in these bacterial cells most likely be affected?
    The enzymes will be destroyed by lysosomes
    The enzymes will lose their bond structure and fall apart.
    The enzymes will require less energy to function than at 70 °C.
    The enzymes will not increase the rate of reactions as much as they would at 70 °C. 
  • 3. Multiple Choice
    30 seconds
    1 pt
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    The graph below shows how the activity of an enzyme changes over a range of pH values. Which of the following conclusions can be drawn from this graph?
    The optimum pH of the enzyme is 6.6.
    The optimum pH of the enzyme is 5.8
    The enzyme’s activity continually increases as pH increases from 5.0 to 9.0
    The enzyme’s activity is greater around pH of 8.0 than around pH of 5.0.
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