BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Solubility. Amino acids are generally soluble in water and insoluble in non-polar organic solvents such as hydrocarbons. This again reflects the presence of the zwitterions.

Detailed explanation-2: -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.

Detailed explanation-3: -For example, some amino acids have polar side chains that are soluble in water; examples include serine, threonine, and asparagine. Other amino acids avoid water and are called hydrophobic, such as isoleucine, phenylalanine, and valine.

Detailed explanation-4: -The amino acid that is least soluble in water is phenylalanine. Amino acids that are not soluble in water have hydrophobic side chains that are either made of steroid rings or alkane chains. This increases their hydrophobicity, even though all amino acids have the polar amine and carboxylic groups.