Answer: lower the activation energy for reactions they catalyze
Explanation: this should be the correct answer but i'm not seeing it for your question, if you forgot to leave it out well this is correct, however if you did not leave this out then I would say A.
Answer:
Synapsis...
<em>Hope that helps!</em>
Explanation:
The answer is; catalyst
These proteins are called enzymes. They work by lowering the activation energy of reactants and hence speed up the biochemical reaction. They are not affected in the process hence one enzyme molecule can catalyze many reactions. An example of such an enzyme is carbonic anhydrase that enables carbon dioxide to dissolve in blood plasma as carbonic acid.