Enzyme Reaction
If the free energy change (ΔG) in a reaction is a negative value, it indicates that the

reaction is in negative direction
reaction releases energy
reaction absorbs energy
reaction is in positive direction

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

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

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