Class 11 Biology - Chapter Digestion and Absorption NCERT Solutions | State the role of pancreatic juice in di
State the role of pancreatic juice in digestion of proteins.
Pancreatic juice contains a variety of inactive enzymes such as trypsinogen, chymotrypsinogen, and carboxypeptidases. These enzymes play an important role in the digestion of proteins.
Physiology of protein-digestion by pancreatic enzymes:
The enzyme enterokinase is secreted by the intestinal mucosa. It activates trypsinogen into trypsin.
Trypsinogen 
Trypsin + Inactive peptide
Trypsin then activates the other enzymes of pancreatic juice such as chymotrypsinogen and carboxypeptidase.
Chymotrypsinogen is a milk-coagulating enzyme that converts proteins into peptides.
Chymotrypsinogen
Chymotrypsin
(Inactive) (Active)
Proteins 
Peptides
Carboxypeptidase acts on the carboxyl end of the peptide chain and helps release the last amino acids. Hence, it helps in the digestion of proteins.
Peptides
Smaller peptide chain + Amino acids
Thus, in short, we can say that the partially-hydrolysed proteins present in the chyme are acted upon by various proteolytic enzymes of the pancreatic juice for their complete digestion.
Proteins, peptones
Dipeptides and proteases
More Questions From Class 11 Biology - Chapter Digestion and Absorption
- Q:-
Bile juice contains no digestive enzymes, yet it is important for digestion. Why?
- Q:-
How does butter in your food gets digested and absorbed in the body?
- Q:-
Discuss the main steps in the digestion of proteins as the food passes through different parts of the alimentary canal.
- Q:-
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- Q:-
Choose the correct answer among the following:
(a) Gastric juice contains
(i) pepsin, lipase and rennin
(ii) trypsin lipase and rennin
(iii) trypsin, pepsin and lipase
(iv) trypsin, pepsin and renin
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(iii) swelling in the gut
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- Q:-
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- Q:-
Answer briefly:
(a) Why are villi present in the intestine and not in the stomach?
(b) How does pepsinogen change into its active form?
(c) What are the basic layers of the wall of alimentary canal?
(d) How does bile help in the digestion of fats?
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10 Comment(s) on this Question
Nyc ,but too lenthy...
Lengthy hai. Ishe short hai mere pass
Awesome ans but too lenthy can't it be made short
Pls easy language me
Unique
didi short bhajo na lagbag 3marks ma
didi short bhajo na lagbag 3marks ma
Nice
It's a good answer
Great
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