Biology - Digestion and Absorption Question with Solution | TestHub
Select the INCORRECT statement regarding digestion in large intestine.
Options:
Answer:
Solution:
The mucosa of the large intestine does not secrete any digestive enzymes, but it secretes mucus to lubricate the fecal matter.
Undigested carbohydrates are fermented by the symbiotic bacteria present in the large intestine, producing short-chain fatty acids and gases like , , and methane.
The bacterial putrefaction of undigested proteins and amino acids produces indole, skatole, phenol, and , which are responsible for the characteristic odor of feces. Thus, indole, skatole, and are not products of carbohydrate digestion.
Symbiotic bacteria in the large intestine also synthesize certain vitamins, such as vitamin K and some B-complex vitamins.
Answer: Carbohydrate digestion ends in production of indole, skatole and .
