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Biochemistry

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Enzymes

Question
6 out of 20
 

Which of the following plant components is not fermented by gastrointestinal microorganisms(AIIMS May 2011)



A Lignin
B Cellulose

C Hemicellulose
D Pectin

Ans. A Lignin

Lignin is a non carbohydrate type dietary fiber that can neither be digested by endogenous mammalian enzymes nor fermented by gasrointestinal microorganism.

Cellulose, hemicellulose and pectins are all components that cannot be digested by endogenous enzymes, but these components can be fermented by local resisdent bacteria in a gastrointestinal tract.

Type of Fiber

Digestion / Hydrolysis in small intestine

Digestion / Fermentation by colonic bacteria

In soluble

Cellulose

Hemicellulose

Lignin

Not digested

Not digested

Not digested

Fermented

Fermented

Not Fermented

Solube

Pectins

Gums and

Alginates

Not digested

Not digested

Fermented

Fermented

Enzymes Flashcard List

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