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How Does Pepsinogen Change into Its Active Form - Biology

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प्रश्न

How does pepsinogen change into its active form?

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उत्तर १

Pepsinogen is a precursor of pepsin stored in the stomach walls. It is converted into pepsin by hydrochloric acid. Pepsin is the activated in the form of pepsinogen.

Pepsinogen  Pepsin + Inactive peptide

(Inactive) (Active)

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उत्तर २

The proenzyme pepsinogen, on exposure to hydrochloric acid, secreted by oxyntic cells of gastric glands gets converted into the active enzyme pepsin, the proteolytic enzyme of the stomach.

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  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 16: Digestion and Absorption - Exercises [पृष्ठ २६७]

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एनसीईआरटी Biology [English] Class 11
अध्याय 16 Digestion and Absorption
Exercises | Q 3.4 | पृष्ठ २६७

संबंधित प्रश्न

Choose the correct answer among the following:

Gastric juice contains

 (i) pepsin, lipase and rennin

 (ii) trypsin lipase and rennin

 (iii) trypsin, pepsin and lipase

 (iv) trypsin, pepsin and renin


Answer briefly:

How does bile help in the digestion of fats?


Bile juice contains no digestive enzymes, yet it is important for digestion. Why?


How are polysaccharides and disaccharides digested?


How does butter in your food gets digested and absorbed in the body?


Name different types of teeth and their number in an adult human.


Emulsification of fats is brought about by ______.


The food mixes thoroughly with the acidic gastric juice of the stomach by the churning movements of its muscular wall. What do we call the food then?


Trypsinogen is an inactive enzyme of pancreatic juice. An enzyme, enterokinase, activates it. Which tissue/ cells secrete this enzyme?/ How is it activated?


Define digestion in one sentence.


Correct the following statement by deleting one of entries (given in bold).

Goblet cells are located in the intestinal mucosal epithelium and secrete chymotrypsin/mucus.


Correct the following statement by deleting one of entries (given in bold).

Fats are broken down into di- and monoglycerides with the help of amylase/ lipases.


Name the part of the alimentary canal where major absorption of digested food takes place. What are the absorbed forms of different kinds of food materials?


Correct the statement given below by the right option shown in the bracket against them.

Pancreatic juice and bile are released through. (intestine- pancreatic/hepato-pancreatic duct)


Correct the statement given below by the right option shown in the bracket against them.

Dipeptides, disaccharides and glycerides are broken down into simple substances in region of small intestine. (jejunum/duodenum)


How is the intestinal mucosa protected from the acidic food entering from stomach?


How are the activities of gastro-intestinal tract regulated?


Describe the enzymatic action on fats in the duodenum.


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