Final answer:
During digestion, nucleic acids are hydrolyzed to form mononucleotides. Proteolytic enzymes act upon the protein part of nucleoproteins, while nucleases break down nucleic acids. The mononucleotides are then further hydrolyzed into nucleosides.
Step-by-step explanation:
Nucleic acids including DNA and RNA are hydrolyzed to form mononucleotides during the digestion of nucleic acids. Proteolytic enzymes in the gastric and intestinal juices act upon the protein part of nucleoproteins, while nucleases in pancreatic and intestinal juices break down nucleic acids into mononucleotides.
These mononucleotides are further hydrolyzed by nucleotidases and nucleosidases into nucleosides, which are absorbed by the intestinal mucosa and transported to the liver.