<u>Answer:</u>
<em>An oxygen is not attached to the central carbon atom in an amino acid.</em>
<u>Explanation:</u>
To understand this, we need to look at the <em>simple molecular structure of amino acids.</em> The basic structure of amino acid consists of an amine , a carboxyl
functional groups.
There is also a R-Group for a particular amino acid on the side chain of it. Although oxygen is one of the key constituents of amino acid it is not directly attached with the <em>central carbon atom in an amino acid.</em>