211 -- How many of the following statements about the compound whose molecular structure is shown below are correct? [Figure: Molecular structure with HO, C=O, NH$_2$, and NH$_2$ groups]
It has amphoteric properties.
It can be used in the preparation of polyamides.
Part of its structure resembles alpha -- amino acids.
The number of carbon atoms in its molecule equals the number of hydrogen atoms in the molecule.
(1) 1 (2) 2 (3) 3 (4) 4
\textbf{211 --} How many of the following statements about the compound whose molecular structure is shown below are correct?
\begin{center}
\textit{[Figure: Molecular structure with HO, C=O, NH$_2$, and NH$_2$ groups]}
\end{center}
\begin{itemize}
\item It has amphoteric properties.
\item It can be used in the preparation of polyamides.
\item Part of its structure resembles alpha -- amino acids.
\item The number of carbon atoms in its molecule equals the number of hydrogen atoms in the molecule.
\end{itemize}
\hspace{2cm} (1) 1 \hspace{2cm} (2) 2 \hspace{2cm} (3) 3 \hspace{2cm} (4) 4