7. Energy and Metabolism
Enzymes
Multiple Choice
Multiple ChoiceEnzyme activity is affected by pH because __________.
A
most substrates do not function well at high or low pH
B
low pH will denature all enzymes
C
changes in pH can cause loss of cofactors from the enzyme
D
the binding of hydrogen ions to the enzyme absorbs energy and thus there may not be enough energy to overcome the activation energy barrier
E
high or low pH may disrupt hydrogen bonding or ionic interactions and thus change the shape of the active site
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