Class 11 Biology - Chapter Digestion and Absorption NCERT Solutions | Describe the process of digestion of pro
Describe the process of digestion of protein in stomach.
The digestion of proteins begins in the stomach and is completed in the small intestine. The digestive juice secreted in the gastric glands present on the stomach walls is called gastric juice. The food that enters the stomach becomes acidic on mixing with this gastric juice.
The main components of gastric juice are hydrochloric acid, pepsinogen, mucus, and rennin. Hydrochloric acid dissolves the bits of food and creates an acidic medium so that pepsinogen is converted into pepsin. Pepsin is a proteolytic enzyme. It is secreted in its inactive form called pepsinogen, which then gets activated by HCL. The activated pepsin then converts proteins into proteases and peptides.
Proteins
Proteoses + Peptides
Rennin is a proteolytic enzyme, released in an inactive form called prorennin. Rennin plays an important role in the coagulation of milk.
More Questions From Class 11 Biology - Chapter Digestion and Absorption
- Q:-
Bile juice contains no digestive enzymes, yet it is important for digestion. Why?
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How does butter in your food gets digested and absorbed in the body?
- Q:-
State the role of pancreatic juice in digestion of proteins.
- Q:-
Discuss the main steps in the digestion of proteins as the food passes through different parts of the alimentary canal.
- 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
(b) Succus entericus is the name given to
(i) a junction between ileum and large intestine
(ii) intestinal juice
(iii) swelling in the gut
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- Q:- Match column I with column II
Column I Column II
(a) Bilirubin and biliverdin (i)Parotid
(b) Hydrolysis of starch (ii) Bile
(c) Digestion of fat (iii)Lipases
(d)Salivary gland (iv) Amylases
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