Experiments revealed the following information about a certain molecule:
it can be broken down into amino acids.
it can break down proteins into amino acids.
it is found in high concentrations in the small intestine of humans.
this molecule is most likely

This molecule is an enzyme, specifically a peptidase enzyme. Enzymes are protein in nature and can thus be broken down into amino acids. A peptidase is a kind of enzyme that specifically breaks down proteins. Peptidases are found in the small intestine in high concentration. They are also known as proteolytic enzymes because they break down protein. Examples of peptidases found in the small intestines are trypsin and chymotrypsin.

They must use the scientific method