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Food

Identify the ...

Question

Identify the correct set which shows the name of the enzymes from where it is secreted and the substrate upon which it acts.

A

Pepsin-stomach wall- casein

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B

Ptyalin- intestine- maltose

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C

Chymotrypsin- salivary gland- lactose

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D

Ptyalin- pancreas- lipid CoA

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Solution

The correct option is A Pepsin-stomach wall- casein
Pepsin is an enzyme whose zymogen (pepsinogen) is released by the chief cells in the stomach and degrades proteins into peptides. In the presence of calcium, rennin changes irreversibly the casein of milk to a paracasein which is then acted upon by pepsin.

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Similar questions

Q. Identify the correct set, which shows the name of the enzyme from where it is secreted and substrate upon which it acts.

Q. In human digestive system, the enzymes pepsin and trypsin are secreted respectively by:
(a) pancreas and liver
(b) stomach and salivary glands
(c) pancreas and gall bladder
(d) stomach and pancreas

Q. A child eats his lunch made of rice, vegetables and pulses. Regarding this which of the following match is incorrect? Substrate of enzyme Enzyme Site of Secretion Products formed

I.	Starch	Salivary amylase	Salivary gland	Maltose, Dextrin
II.	Proteins	Pepsin	Stomach	Large peptides
III.	Lipase	Enterokinase	Small intestine	Fatty acids
IV.	Nucleic acids	Nucleases	Pancreas	Nucleotides

Q. Digestion is the process of breakdown of complex food substances into simpler substances. Secretion of various glands like stomach, salivary gland, pancreas, liver and intestinal gland are involved in this process.
Select the gland whose secretion contains lipase and converts fats into simpler fats.

Q. Which of the following is the correct matching of the site of action on the given substrate, the enzyme acting upon it and the end product?
(i) Small intestine: Protein

P e p s i n - --- \to

Amino acid
(ii) Stomach : Fat

L i p a s e - --- \to

Micelles
(iii) Duodenum : Triglycerides

T r y p s i n - ---- \to

Monoglyceride
(iv) Buccal cavity : Starch

A m y l a s e - ---- \to

Disaccharide
(v) Jejunum: Peptones

P e p s i n - --- \to

Amino acid
(vi) Buccal cavity : Starch

A m y l o g l y c e r a t e - -------- \to

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