Amino acids have 4 different groups relevant to its structure. There is the central Carbon, which is Carbon and Hydrogen, the Amino group which is Nitrogen and two Hydrogens (NH2), the Carboxyl group which is Carbon, Oxygen, and Oxygen Hydrogen (COOH) and the R group, which could be anything as its different for each amino acid
When amino acids join together they create a peptide bond which has the same reaction as glucose as it happens when H20 is removed. When the H2O is removed the amino acids make a polypeptide chain
Amino acids are the building blocks of protein. There are around 20 different amino acids that all have a similar chemical structure but behave in very different ways because they have different side groups.
The sequence of the amino acids determines the shape, properties and the biological role in the protein.
For example, Collagen is a form of fibrous protein found in the connective tissue of skin, tendons and bones. While Haemoglobin is a form of globular protein which binds to oxygen to transport it around the body.