The biological catalyst that speeds the rate of reaction is called enzymes. The enzymes produce a substance at the end of the reaction, called a product. Thus, option B is correct.
What are enzymes?
Enzymes are substances made of proteins and are involved in catalyzing the biological and chemical processes without undergoing changes.
They through the active site to the substrate to form a complex and as a result a product. This complex leads to conformational changes that produce another substance.
The active site of the enzyme is unique and different for various substrates. The enzymes are protein in nature and not lipids. The product produced has different chemical and physical properties.
Therefore, in option B. the enzymes produce products at the end of the reaction.
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