Answer: B - Enzymes are necessary for many biochemical reactions to occur in living organisms, but reactions can occur without them. Enzymes are specialized proteins that act as biological catalysts, meaning they speed up chemical reactions without being consumed in the process.
Enzymes lower the activation energy required for a chemical reaction to occur, which makes it easier for the reactants to come together and form the products. Without enzymes, many of the chemical reactions that are necessary for life would occur too slowly to be useful.
Enzymes are involved in a wide range of cellular processes, including digestion, metabolism, and the production of energy. They are also involved in the synthesis of DNA, RNA, and proteins, as well as in the breakdown of toxins and other harmful substances.
While some reactions can occur spontaneously without the help of enzymes, most reactions in living organisms require enzymes to occur at a sufficient rate to support life.
