ch 6 nutr

_________ describes a protein chain made up of two amino acids joined together by a peptide bond.

Dipeptide

Amino acids are bound together by a chemical bond known as an amino acid bond to form proteins.

FALSE , peptide bonds

Amino acids found in the amino acid pool __________.

an be used for protein synthesis Amino acids found in the amino acid pool are used mostly for building proteins. When necessary, our bodies can also use them for energy or convert them to body fat.

The process in which a protein's shape is altered, called ____________ destroys the protein's function without disrupting the peptide bonds.

denaturation,

This strong acid, called ___________, is produced in the stomach and denatures proteins.

hydrochloric acid

Which of the following amino acids are considered essential?

lysine, methionine, and threonine The nine essential amino acids are histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.

An active protein enzyme in the stomach that begins the chemical digestion of protein is called

pepsin.

This protease, called ______, is secreted from the gastric cells and converted to its active form by hydrochloric acid.

pepsinogen

Amino acids are linked together by _________ created when the acid group of one amino acid is joined with the nitrogen-containing amine group of another amino acid through condensation.

peptide bonds,

A protein chain consisting of 10 to more than 100 amino acids joined together by peptide bonds is called a __________

polypeptide.

A classification of protein enzymes that break peptide bonds linking amino acids together is referred to as a _________.

protease

A protein chain made up of three amino acids joined together by peptide bonds is called __________

tripeptide.

The side chain of an amino acid differentiates one amino acid from another.

true