Enzyme Reaction
An endergonic reaction is one that

looses energy
gives off much heat
requires energy in order to proceed
releases energy for work

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Enzyme Reaction
Which of the following is the best evidence for the lock and key theory of enzyme action?

Enzymes are found in living organisms and speed up certain reactions
Enzymes determine the direction of a reaction
Compounds similar in structure to the substrate inhibit enzyme activity
Enzymes speed up reactions by definite amounts

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