Question

What is the function of enzymes in the living system?
(a) Transport oxygen
(b) Provide immunity
(c) Catalyze biochemical reaction
(d) Provide energy

Answer 1

Catalyst alters the reaction rate without any major change in itself. Enzymes are the catalyst which can change the rate of biochemical reaction. They are protein molecules which are present in the environment.

Complete answer:
-Enzymes are protein molecules present in the living system to alter the biochemical reaction. They regulate the rate at which reactions proceed without even being altered in the reaction.
-Since enzymes act as catalysts, their main function in the living system is to catalyze the biochemical reaction.
-The biological process such as the digestion of food, in which large nutrient molecules are broken down into smaller molecules; the conservation and transformation of chemical energy; and the construction of cellular macromolecules .many inherited human diseases, result from a deficiency of a particular enzyme. Some of the examples of enzymes are digestive enzymes of animals like Pepsin (help to break down food particles in the stomach) and Amylase, present in the saliva (converts starch into sugar, helping to initiate digestion) and many more.
So, the correct option is (C) catalyze biochemical reactions.

Additional information: Catalase protects cellular organelles (subcellular structure) and tissues from damage by peroxide, which is continuously produced by metabolic reactions. Enzyme activity is affected by various factors, including substrate concentration and the presence of inhibiting molecules. If the enzyme is subjected to changes, such as fluctuations in temperature or pH, the protein structure may lose its integrity (denature) and its enzymatic ability.

Note:
Enzymes are biochemical catalysts, that is, within the conditions of living organisms they speed up the reaction at amazing rates. Enzymes are usually produced by plants and animals only.