Question

A 'ring' is simply a chain or part of a molecule where the atoms form into a circle or... ring. these amino acids have rings in their sidechains: tryptophan answer 1 phenylalanine answer 2 arginine answer 3 histidine answer 4 methionine answer 5 glutamic acid

Answer 1

The amino acids with rings in their sidechains are tryptophan, phenylalanine, and histidine (see the attached image).

Arginine methionine, and glutamic acid do not have rings in their sidechains.