BOTH!!!
an inactive substance that is converted into an enzyme when activated by another enzyme.
protein-digesting enzymes
complement
Yes. Born as endosomes that contain inactive enzymes, lysosomes are spherical, membranous organelles containing activated digestive enzymes. Lysosomes are large and abundant within phagocytes, the cells that dispose of invading bacteria and cell debris. Lysosomal enzymes can digest almost all kinds of biological molecules. They work best in acidic conditions and so are called acid hydrolases.
Carboxypeptidase is secreted by Pancreas in inactive form (procarboxypeptidase) and is activated by trypsin. Carboxypeptidase is also secreted by small intestine as brush border enzyme. Reference: Human Anatomy and Physiology by Elaine N. Marieb
Proteolytic enzymes will destroy the cells that produced them if they are produced in an active form. To protect the body's own cells these enzymes are secreted in an inactive form into the digestive tract and activated where they are needed.
An inactive protein can be converted into an active protein through the process of proteolysis. This process happens through the hydrolysis of the peptide bond, which is aided by cellular enzymes.
an inactive substance that is converted into an enzyme when activated by another enzyme.
protein-digesting enzymes
To protect the body.
the last step is ofcourse glycogen breakdown.......before that inactive glycogen phosphorylase-b is activated and phosphorylated to glycogen phosphorylase-a by the help of activated phosphorylase kinase........ ......phosphorylase kinase was activated by activated protien kinase..and activated protien kinase was activated by cyclic amp...........
Small Intestine is where they are activated to put to use.
The acinar cells of the pancreas secrete proteolytic enzymes as zymogens or proenzymes. These enzymes are in their inactive form and must be activated by something else. One of these enzymes, trypsinogen, is activated by enterokinase found in the cells that make up the duodenum wall. Once activated to trypsin, it activates the other digestive enzymes.
Pepsin is a powerful protein digesting enzyme which is far too dangerous in its active form so it is released in an inactive pepsinogen form by the cell and activated only in the digestive tract where it is required to be active.
complement
Acid chyme (nutrient broth from food) enters from the stomach. Protein digesting enzymes enter, but in an inactive form. Pancreatic proteases become activated here. And several digestive enzymes go into the lumen of the duodenum.
Pepsinogen is an inactive form of the digestive enzyme pepsin. Almost all enzymes are proteins, and proteins are organic macromolecules.