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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

Match column I with column II

  Column I   Column II
a Bilirubin and biliverdin 1 Parotid
b Hydrolysis of starch 2 Bile
c Digestion of fat 3 Lipases
d Salivary gland 4 Amylases

Answer briefly:

How does bile help in the digestion of fats?


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


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


How are polysaccharides and disaccharides digested?


What would happen if HCl were not secreted in the stomach?


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.


Which of the following sphincter controls the passage of food into the stomach?


Mark the right statement among the following


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


Name the enzymes involved in the breakdown of nucleotides into sugars and bases?


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?


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


A person had roti and dal for his lunch. Trace the changes in those during its passage through the alimentary canal.


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