Amino Acids

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

Which amino acid has a polar, non-ionic group

Which is classified as non-polar

Phenylketonuria (PKU) is thought to be a genetic disease caused by

Which amino contains a guanido group in its sidde chain

Which amino acid has the one letter symbol K

Which amin acid take on a negative charge when R-group loses an atom

Tyrosine is a precursor of all the following except

Which of the following has a net positive charge at physiologic pH

Which amino acid is neither D or L in configuration

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

All are ionizable in proteins, except

which of the following statements about solutions of amino acids at physiological ph is true?

All of the ff. amino acids contain only methyl or methylene groups as costituents of their side chain except

Which of the ff. amino acids is nearly always found buried in the center of proteins

Which amino acids can form disulfide bonds

Group of A.A. with polar side chains

Which of the ff. amino acids contains an amide group in its side chain

Which A.A. contains indole group in its side chain

In humans all the ff. A.A. are nonessential except

All describe characteristics of the peptide bond except

Which A.A. is not found in proteins

Which statement is incorrect about the classification of A.A.

Which A.A. has aromatic groups on its side chain

Which one is actually an imino acid

The absolute configuration of amino acids is denoted by its relationship to the L-or D- forms of

At neutral pH, a mixture of amino acids in solution would be predominantly

Which is true about glutamine

Which A.A. contains imidazole group in its sid chain

Which A.A. contains hydroxyl group in its R group

All A.A. are found in protein except

Which amino acid is most compatible with alpa-helical structures

All A.A. contain cyclic groups except

All A.A. are found in unusually high amounts in collagen compared with other proteins

Which A.A. has basic side chains

20 common amino acids are optically active except

highest concentration of cysteine could be found in

Which A.A. contains the smallest side chain

The simplest amino acid is

amino acids are mostly synthesized from

The first amino acid of any polypeptide chain in a prokaryote is

th naturally occuring proteins consist of

Which A.A. is a helix terminator

Which of the followig A.A. has a buffering capacity

Which is an alpha imino acid

Sulphur containing A.A.

Positively charged basic amino acids are

Absorbance at 280nm exhibited by protein is due to

Which among the following is both glucogenic and ketogenic