SELECT * FROM question_mgmt as q WHERE id=543 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=2 AND subId=7 AND chapterId=19 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 11th biology Digestion and Absorption describe the digestive role of chymotrypsin what

Question:

Describe the digestive role of chymotrypsin. What two other digestive enzymes of the same category are secreted by its source gland?

Answer:

The enzyme trypsin (present in the pancreatic juice) activates the inactive enzyme chymotrypsinogen into chymotrypsin.

Chymotrypsinogen Trypsin Chymotrypsin

(Inactive)                                   (Active)

The activated chymotrypsin plays an important role in the further breakdown of the partially-hydrolysed proteins.

ProteinsThe activated chymotrypsin plays an important role in the further breakdown of the partially-hydrolysed proteins. Peptides

The other digestive enzymes of the same category are trypsinogen and carboxypeptidase. These are secreted by the same source-gland, pancreas.

Trypsinogen is present in an inactive form in the pancreatic juice. The enzyme enterokinase – secreted by the intestinal mucosa – activates trypsinogen into trypsin.

Trypsinogenenterokinase Trypsin + Inactive peptide

The activated trypsin then further activates the remaining trypsinogen and activates other pancreatic enzymes such as chymotrypsinogen and carboxypeptidase. Trypsin also helps in breaking down proteins into peptides.

ProteinsTrypsinPeptides

Carboxypeptidases act on the carboxyl end of the peptide chain and help in releasing the last amino acids.

PeptidesCarboxypeptidasesSmall peptide chain + Amino acids


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