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(d) How does bile help in the digestion of fats ?

(d) Bile has no fat digesting enzymes, however, it helps in digestion of fats. In neutralizes acidic medium. It emulsifies the fats and increases surface area so that maximum action of lipase occurs and fats get digested.
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State the role of pancreatic juice in digestion of proteins.

Role of pancreatic juice in digestion of proteins.

The pancreatic juice contains inactive enzymes – trypsinogen, chymotrypsinogen, procarboxypeptidases, amylases, lipases and nucleases. 

i. Proteins, proteoses and peptones in the chyme reaching the intestine are acted upon by the proteolytic enzymes of pancreatic juice.

ii. Carbohydrates in the chyme are hydrolysed by pancreatic amylase into disaccharides.



iii. Fats are broken down by lipases



iv. Nucleases in the pancreatic juice acts on nucleic acids to form nucleotides and nucleosides.


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

Bile is important for digestion in the following ways :

(1) Bile neutralizes acidic medium.

(2) Bile is germicidal.

(3) Bile emulsifies fats.

(4) Bile activates lipases.

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


Chymotrypsin converts proteins, peptones or proteoses into dipeptides.

Other two enzymes are tyrpsin and carboxy peptidase which are secreted by the glands by pancreas.

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Describe the process of digestion of protein in stomach.


The digestion of the proteins starts in the stomach with the help of pepsin. The proenzyme pepsinogen gets converted into the active enzyme pepsin; on exposure to hydrochloric acid. Pepsin converts proteins into proteoses and peptones (peptides).

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