Enterokinase converts

The enzyme trypsin,secreted in the duodenum,is most active at an optimum pH of:

$A$ young infant may be feeding entirely on mother's milk which is white in colour,but the stools which the infant passes out are quite yellowish. What is this yellow colour due to?

In which part of the alimentary canal does the digestion of chyme and the absorption of nutrients take place?

Secretion of salivary gland performs following functions $EXCEPT$ . . . . . . .

Complete the analogy with reference to the product of digestion in human beings: Buccal cavity: $x$ :: Stomach: $y$