Discussion
Which type of attachment between the molecule and the enzyme changes the enzymatic activity?
Answer: B
Correct answer: Covalent
Covalent modification - the attachment or removal of a group such as phosphate, methyl, acetyl or ADP-ribose - changes an enzyme’s activity by altering its charge and shape. It is a true chemical bond, so the change persists until another enzyme reverses it, which is what makes it a switch rather than a rheostat.
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