Models of different combinations of elements are shown Image water oxygen gas amino acid glycine Which image(s) show a molecule? Only the second image, water, is a molecule. Only the third image, amino acid glycine, is a molecule All three images, oxygen, water, and amino acid , are molecules

Covalent bonds, which hold the atoms within an individual molecule together, ... For instance, as we learn in Chapter 3, the shape of proteins is crucial to their ... only six different atoms: hydrogen, carbon, nitrogen, phosphorus, oxygen, and sulfur. ... Except for glycine, all amino acids, the building blocks of the proteins.

Explanation: