Question

in animal cells, glycogen is broken down to release energy to help with muscle contraction. a polymer like glycogen is broken down in a process called hydrolysis, where a water molecule breaks, or lyses, a bond in the polymer to make monomers.
the model shows a hydrolysis reaction.
chemical structure diagram
complete the sentence.
during a hydrolysis reaction, dropdown are broken down into dropdown to release dropdown.

Explanation:

1. From the text, we know glycogen (a polymer) is broken down via hydrolysis. The model shows a polymer (two sugar units linked) being broken down.
2. Hydrolysis of polymers (like glycogen, which is a polysaccharide) breaks them into monomers (monosaccharides, like glucose here).
3. The purpose of this breakdown is to release energy (as stated: "glycogen is broken down to release energy").

So, the first blank is "polymers" (or specifically "glycogen" or "polysaccharides", but the general term from the reaction model is polymer), the second is "monomers" (or "monosaccharides"), and the third is "energy".

Answer:

During a hydrolysis reaction, $\boldsymbol{\text{polymers}}$ (or "glycogen", "polysaccharides") are broken down into $\boldsymbol{\text{monomers}}$ (or "monosaccharides", "glucose") to release $\boldsymbol{\text{energy}}$.