nitrogen and oxygen make up 99% of the atmosphere. Trace elements make up the remaining 1%. Argon, sulfur, carbon, and water vapor are trace elements and make up what percent of the atmosphere? A. 1% B. 99%​

A. Catalyst

Explanation:

An catalyst is used to speed up the rate of the reaction. In a biochemical reaction an enzyme is the only catalyst which is exposed to the reactant forming the enzyme substrate or reactant complex thus forming the product. The catalyst increases the product formation from the reactant by increasing the pace of the reaction. Catalyst does not get consumed in the reaction. It can be used repeatedly for multiple reactions.