What evidence would indicate a new material has been produced? A Soot appears on a fireplace after a fire.

A metal spoon gets hot after coming out of a dishwasher.
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A The hubcap of a car is bent during an accident.

A wire sags when too much electricity passes through it.

1. an enzyme is considered a(n) because it speeds up a chemical reaction without being used up.2. in a catalyzed reaction, a reactant is often called a(n) . an enzyme is specific because the shape of its matches only particular reactants.4. an enzyme speeds up reactions by lowering the . the between an active site and its substrate often strains bonds and the reaction proceed.6. a( , which is often a vitamin, binds to an enzyme and plays a role in catalysis.7. high temperatures or changes in ph can an enzyme, causing it to lose its shape and biological activity.