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Chapter Quiz
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1Define enzyme.


2Define substrate.


3When an enzyme-substrate complex stresses or distorts chemical bonds and makes the substrate more reactive, it is in a ________ state.
A)denatured
B)optimal
C)transition
D)translation


4The extra energy required to destabilize existing chemical bonds for an enzymatic reaction to occur is called the ________ energy.


5Catalysts accelerate particular reactions by increasing the amount of energy required to initiate the reaction.
A)True
B)False


6Define active site.


7Each enzyme catalyses a specific reaction based on the enzyme's unique structure and shape.
A)True
B)False


8Enzymes increase the speed of a reaction but are not themselves permanently altered in the process.
A)True
B)False


9When an enzyme's active site is structurally altered, thereby decreasing its effectiveness, the enzyme is ________.
A)deoxygenated
B)denatured
C)catalyzed
D)transitioned


10________ are the range of values of environmental factors at which an enzyme functions best.


11List the two environmental factors that affect the enzymatic reactions you'll be studying today.


12Identify each molecule as a product, substrate, or enzyme in the following reaction:
2 H2O2 →catalase→ 2 H2O + O2


13What should you do if you spill HCl or NaOH on your skin?


14Define competitive inhibition.


15What are the common letters ending the names of enzymes listed in your lab manual?





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