Which enzymes are likely to act on the backed potatoes eaten by a man, starting from the mouth and as it moves down the alimentary canal?

Select the correct match of the digested products in humans given in column $${\rm I}$$ with their absorption site and mechanism in column $${\rm I}$$$${\rm I}$$.

For its activity, carboxypeptidase requires

Where do certain symbiotic microorganisms normally occur in human body?