The purpose of a cofactor is to BLANK of catalysis. Coenzymes are a specific type of cofactor. They BLANK during the Krebs cycle, which is an important part in cellular metabolism.
Option 1 choices:
A. blind an enzyme during the process
B. increase the rate
C. decrease the rate
D. prevent the formation
Option 2 choices:
A. blind tightly to proteins
B. bond with metallic ions
C. convert to inorganic substances
D. transport electrons
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