<prompt> How many amino acids are present in a single turn of a-helix?3.33.610.511.5  <response>: a-helix is a rod-like helical structure where peptide backbone wound around a long axis, the side chains R groups radiate outward N-H group of one amino acid is hydrogen bonded to the CO group of the amino acid located four residues earlier along the protein sequence. This hydrogen bonding creates a right-handed spiral or helix coiled, rod-like structure. Most of the naturally occurring a-helix are right-handed. One turn of a-helix contains 3.6 amino acids. Distance between two adjacent amino acids is 1.5 Adeg 