LIFE SCIENCE

Detailed explanation-1: -Enzymes in our bodies are catalysts that speed up reactions by helping to lower the activation energy needed to start a reaction. Each enzyme molecule has a special place called the active site where another molecule, called the substrate, fits.

Detailed explanation-2: -Enzymes perform the critical task of lowering a reaction’s activation energy-that is, the amount of energy that must be put in for the reaction to begin. Enzymes work by binding to reactant molecules and holding them in such a way that the chemical bond-breaking and bond-forming processes take place more readily.

Detailed explanation-3: -An enzyme is a biological catalyst. It speeds up a reaction by lowering or reducing the activation energy of the reaction. It can increase the rates of both forward and backward reactions.

Detailed explanation-4: -Enzymes convert the substrates into other distinct molecules, which are known as products. The regulation of enzymes has been a key element in clinical diagnosis because of their role in maintaining life processes.

Detailed explanation-5: -The correct answer is A) the activation energy. Enzymes speed up chemical reactions by lowering the activation energy.