LIFE SCIENCE

Detailed explanation-1: -First, they increase the rate of chemical reactions without themselves being consumed or permanently altered by the reaction. Second, they increase reaction rates without altering the chemical equilibrium between reactants and products.

Detailed explanation-2: -How do enzymes affect the reactions in living cells? Enzymes affect the reactions in living cells by lowering the activation energy of the reaction.

Detailed explanation-3: -Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy.

Detailed explanation-4: -An enzyme is a biological catalyst and is almost always a protein. It speeds up the rate of a specific chemical reaction in the cell. The enzyme is not destroyed during the reaction and is used over and over.

Detailed explanation-5: -Enzymes are catalysts in living things. They speed up biochemical reactions. Enzymes increase the rate of chemical reactions by reducing the amount of activation energy needed for reactants to start reacting. More than 1000 different enzymes are necessary for human life.