Question

as a result of its involvement in a reaction, an enzyme ____. is unchanged loses a phosphate group loses energy is used up permanently alters its shape

Explanation:

Enzymes are biological catalysts. Catalysts speed up chemical reactions without being consumed or permanently altered in the process. They lower the activation energy of a reaction. After facilitating a reaction, an enzyme can be reused. Losing a phosphate group, losing energy, being used up, or permanently altering shape would prevent the enzyme from functioning as a catalyst in subsequent reactions. Since enzymes are unchanged (in terms of their fundamental structure and ability to function in future reactions) after participating in a reaction, the correct option is based on this property.

Answer:

is unchanged