BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Aromatic amino acids are relatively nonpolar. To different degrees, all aromatic amino acids absorb ultraviolet light. Tyrosine and tryptophan absorb more than do phenylalanine; tryptophan is responsible for most of the absorbance of ultraviolet light (ca. 280 nm) by proteins.

Detailed explanation-2: -This group of amino acids includes glycine, alanine, valine, leucine, isoleucine and proline.

Detailed explanation-3: -Aliphatic R groups are nonpolar and hydrophobic. Hydrophobicity increases with increasing number of C atoms in the hydrocarbon chain. Although these amino acids prefer to remain inside protein molecules, alanine and glycine are ambivalent, meaning that they can be inside or outside the protein molecule.

Detailed explanation-4: -Non-polar amino acids are a class of amino acids in which the variable R-group is comprised of mostly hydrocarbons; the amino acids cysteine and methionine also feature a sulphur atom, but (due to its similar negativity to carbon) this does not confer any polar properties to either of these amino acids.