Amino Acids Quiz

Which amino acid is not classified as nonpolar?

• L

• all of these

• P

• I

• V

The highest concentration of cystine can be found in

• keratin

• myosin

• chondroitin sulfate

• melanin

• collagen

Which of the following amino acids is most compatible with an alpha-helical structures?

• lysine

• alanine

• cysteine

• proline

• tryptophan

All of the following amino acids are found in proteins EXCEPT

• methionine

• threonine

• homocysteine

• cysteine

• isoleucine

All of the following amino acids are found in unusually high amounts in collagen as compared with other proteins EXCEPT

• proline

• hydroxyleucine

• hydroxyproline

• glycine

• isoleucine

Which group of consists only of amino acids with polar side chains?

• S, T, L

• all of these

• S, T, V

• S, T, C

• S, T, I

Which is the N-terminal amino acid in the peptide Ala-Gln-Arg-Ser-His?

• Arg

• Gln

• His

• Ala

• Ser

The concentration of hydrogen ion in a solution is expressed as the pH, which is numerically equivalent to

• - log [H+]

• 1/ log [H+]

• ln [H+]

• - ln [H+]

• log [H+]

Which statement is incorrect about the classification of amino acids?

• Met and Cys are sulfur-containing amino acids.

• Ser and Thr are neutral amino acids.

• Lys and Arg are basic amino acids.

• Trp and Phe are aromatic amino acids.

• Glu and Asn are acidic amino acids.

Which of the following amino acids contains a hydroxyl group in its side chain?

• Glycine

• Arginine

• proline

• Cysteine

• Serine