Final answer:
Enzymes regularly found inside a cell are known as intracellular enzymes, responsible for catalyzing important biochemical reactions necessary for cellular function.
Step-by-step explanation:
Enzymes that are regularly found inside a cell are termed intracellular enzymes. These enzymes, which include examples such as Isocitric dehydrogenase, phosphorylase, and Kinase and phosphofructokinase, are catalysts that catalyze biochemical reactions vital for cellular metabolism and regulation.
Intracellular enzymes speed up reactions that would otherwise occur too slowly at normal temperatures for the cell's needs, thus playing an essential role in maintaining life. Some enzymes are inducible enzymes, synthesized by the cell when needed, while others are constitutive enzymes that are always present.