Question

What are preformed enzymes?

1) Enzymes that are synthesized in the body
2) Enzymes that are obtained from external sources
3) Enzymes that are present in the form of precursors
4) Enzymes that are involved in metabolic reactions

Answer 1

Preformed enzymes are enzymes that are synthesized in the body and are already present and ready for use. They are classified as constitutive enzymes and examples include salivary amylase.

Step-by-step explanation:

Preformed enzymes are enzymes that are synthesized in the body. They are already present and ready for use when needed in metabolic reactions. These enzymes are classified as constitutive enzymes, which means they are constantly present in normal amounts in the body, irrespective of inducers. An example of a preformed enzyme is salivary amylase, which helps in the breakdown of starch in the mouth.