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. larger peptide molecules must be completely broken down into amino acids to be absorbed into the bloodstream from the intestine.
c. cells in the small intestine absorb different types of amino acids at separate absorption sites, which causes competition by 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 requires simultaneous ingestion of some form of carbohydrate.
Question 2
Tim, who lost a large amount of weight during an illness, is thinking about taking amino acid supplements to help him regain muscle mass. What advice would you give him?
a. Amino acid supplements are an excellent way to quickly provide energy to muscles for rebuilding.
b. Taking amino acid supplements helps keep the digestive system from overworking while you recover from illness.
c. Extra carbohydrate, but never extra protein, is needed for recovery.
d. He should also do plenty of exercise to promote muscle regain.
e. Whole protein is better handled by the digestive system and will better promote recovery.
Extracellular digestion in a gastrovascular cavity.
Some biologically important hydrogen bonds
Organization of proteins based on motifs
Exon recognition through cooperative binding of SR proteins and splicing factors
Abdominal massage can improve digestion and relieve constipation.
Mass spectrometry (MS) for Mass, Sequence, and Amino Acid Analyses of Purified Proteins