Although the hydroxyl groups in serine and threonine are uncharged,they can react within active sites of some enzymes ________.
A)precisely because they are uncharged
B)because the hydroxyl group is polar
C)because the hydroxyl group is small and fits into the site
D)All of the above

Question

Quizplus · Accepted Answer

The hydroxyl group in serine and threonine is polar, which allows it to form hydrogen bonds with other polar molecules or atoms within the active site of enzymes. This enables it to participate in chemical reactions, leading to enzyme catalysis. The fact that they are uncharged and small enough to fit into the active site may also contribute to their reactivity within enzymes, but the major factor is their polarity.

Although the Hydroxyl Groups in Serine and Threonine Are Uncharged,they