Question

what happens during a hydrolysis reaction?

a polymer is built from subunits as water molecules are split.
a polymer is broken into its subunits and in the process, water molecules form.
a polymer is broken into its subunits as water molecules are split.
a polymer is built from subunits and in the process, water molecules form.

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Explanation:

Hydrolysis is a reaction where a water - molecule is used to break a bond in a polymer. The water molecule splits, and its components are added to the subunits formed from the broken - down polymer.

Answer:

A polymer is broken into its subunits as water molecules are split.