AUA Med 1 -- Foundations-- Amino Acids & Proteins Questions With Complete Solutions

Describe the structure of amino acids correct answer: They are compounds that have an amino group (NH2) and a carboxylic acid group (COOH) All amino acid have a carboxyl group and a primary amino group except... correct answer: Proline: it has a secondary amino group (the N is bonded to 2 R groups instead of 1) What type of linkage combines carboxyl and amino groups? correct answer: Peptide linkage What part of the amino acid dictates the role in a protein? correct answer: the side chain (R group) How are amino acids classified? correct answer: Baded on the nature of side chains groups, polarity, fate of carbon skeleton, and nutritional requirement Which amino acids have aliphatic side chains (open chains rather than benzene ring)? correct answer: glycine, alanine, valine, leucine, and isoleucine Which amino acid's side chains contain Hydroxyl (OH) groups? correct answer: serine, threonine, and tyrosine Which amino acid's side chains contain sulfur atoms? correct answer: cysteine and methionine Which amino acid's side chains contain acidic groups and their amides? correct answer: aspartic acid, glutamic acid, asparagine, and glutamine Which amino acid's side chains contain basic groups? correct answer: arginine, lysine, histidine Which amino acid's side chains contain aromatic rings? correct answer: histidine, phenylalanine, tyrosine, and tryptophan.