LIFE SCIENCE

Detailed explanation-1: -Enzymes are not reactants and are not used up during the reaction. Once an enzyme binds to a substrate and catalyzes the reaction, the enzyme is released, unchanged, and can be used for another reaction.

Detailed explanation-2: -Enzymes increase the rate of chemical reactions by reducing the amount of activation energy needed for reactants to start reacting. Enzymes aren’t changed or used up in the reactions they catalyze, so they can be used to speed up the same reaction over and over again.

Detailed explanation-3: -Like other catalysts, enzymes are not reactants in the reactions they control. They help the reactants interact but are not used up in the reactions. Instead, they may be used over and over again. Unlike other catalysts, enzymes are usually highly specific for particular chemical reactions.

Detailed explanation-4: -True or false, An enzyme speeds up a chemical reaction in the cell, but can only be used once. False.

Detailed explanation-5: -Enzymes in our bodies are catalysts that speed up reactions by helping to lower the activation energy needed to start a reaction.