PROTEINS AND AMINO ACIDS

In chromatography, it is usually a high-quality filter paper or an adsorbent.

• mobile phase

• stationary phase

• blank phase

This color is produced upon the reaction of ninhydrin solution with the amino acids in paper chromatography.

• Methy red

• Bromocresol green

• Ruhemann purple

• Crystal violet

All are α-amino acids, except:

• asparagine

• threonine

• arginine

• proline

It is used to detect presence of guanidino group found in the amino acid arginine.

• Biuret test

• Sakaguchi test

• Ninhydrin test

• Millon test

Which among the following amino acids will yield a positive result with Millon's test

• tyrosine

• arginine

• valine

• isoleucine

Which among the following tests is considered to be a general test for amino acids?

• Sakaguchi test

• Hopkins-Cole test

• Biuret test

• Millon test

This property of amino acids refers to their ability to act as an acid or a base.

• zwitterionic

• chirality

• UV absorptive

• amphoteric

High-protein substances such as egg whites and milk are used as antidotes for heavy metal poisoning

because they combine with heavy metals to form insoluble precipitates.

• True

• False

Which among the following bonds is affected by heavy metals?

• disulfide bonds

• hydrogen bonds

• ionic bonds

Proteins are held in their native conformations by which of the following bonds:

• hydrogen bonds

• ionic bonds

• disulfide bonds

• all of the above