When Considering the Digestion and Absorption of Proteins, It Is

When considering the digestion and absorption of proteins, it is important to know that:

A) proteins are broken down into individual amino acids and absorbed by all intestinal cell absorption sites at an equal rate
B) dipeptide and tripeptide molecules must be completely broken down into amino acids to be absorbed into the bloodstream from the intestine
C) cells of the small intestine absorb different types of amino acids at separate absorption sites, which causes competition between similar amino acids at these absorption sites
D) amino acids need a carrier in the bloodstream because they do not transport very well alone
E) protein digestion and absorption require simultaneous ingestion of some form of carbohydrate