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Digestion and Absorption

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12
Describe digestion of proteins.

Digestion of proteins :

Proteins do not get any justice in buccal cavity. The digestion pf proteins takes place in the stomach . The gastric juice has HCl, propepsin, prorennin and weak gastric lipase. The HCl converts the enzyme pepsinogen into pepsin. The pepsin is an proteolitic enzyme which converts proteins to peptones converts casein of milk into paracasein.

In duodenum :The pancreatic juice has many enzymes like trypsinogen, amylases, lipases, chymotrypsinogen, procarboxypeptidase and nucleases..

Functions of Trypsin and Chymotrypsin :

1. Converts proteins to peptides.

2. Trypsin acts on keratin present in exoskeleton and converts that to peptones.

Functions of carboxy-peptides : It separates amino acids present adjacent to carboxylic acid group in peptides.

Digestion of proteins in jejunum-ileum :  The intestinal juice contains following protein digesting enzyme.

Aminopeptidase : It separates amino acids adjacent to amino group.

Describe digestion of proteins.

Dipeptidase converts dipeptides to amino acids.


What are Sanguivorous animals ?

The animals which suck blood e.g. leech, vampire bat, female mosquito etc.

What is the order of arrangement of teeth in each half of the upper and lower jaw ?

The order of arrangement of teeth in each half of the upper and lower jaw is I,C,PM,M.  I (incisors), C (cannine), PM (premolars), M (molars).

What is Diphyodont ?

Diphyodont is the condition of having two set of teeth during the life of an organism. For example : humans are diphyodont as they have two set of teeth namely temporary milk or deciduous teeth which are replaced by permanent or adult teeth. 


Name the fat soluble vitamins.

Vit A, D, E and  are fat soluble vitamins.

What is the function of enamel in digestion?

The enamel helps in the mastication of food.