Question

6.) during a chemical reaction, ______ are either formed or broken. *
o elements
o macromolecules
o substrates
o bonds
7.) true or false: enzymes are used up in a chemical reaction and are therefore not reusable
o true
o false

Explanation:

• For question 6, in a chemical reaction, chemical bonds between atoms are broken and new bonds are formed to create new substances. Elements are not formed or broken in normal chemical reactions (nuclear reactions are different), macromolecules are large - scale structures and not the basic entities that change in this way, and substrates are reactants in enzyme - catalyzed reactions.
• For question 7, enzymes are biological catalysts. They lower the activation energy of a chemical reaction but are not consumed in the reaction and can be reused.

Answer:

1. D. bonds
2. False