Name the enzymes involved in the breakdown of nucleotides into sugars and bases?

Trypsinogen is an inactive enzyme of pancreatic juice. An enzyme, enterokinase, activates it. Which tissue/ cells secrete this enzyme?/ How is it activated?

In which part of alimentary canal does absorption of water, simple sugars and alcohol takes place?

Define digestion in one sentence.

What do we call the type of teeth attachment to jaw bones in which each tooth is embedded in a socket of jaws bones?