Glycine is an amino acid. The formula of glycine is H2NCH2COOH\text{H}_2\text{NCH}_2\text{COOH}H2NCH2COOH.
The figure shows an incomplete displayed structural formula of glycine.
Figure: An incomplete displayed structural formula of glycine

Complete the figure to show the displayed structural formula of glycine.
Name the two functional groups in glycine.
Name the polymer produced when many glycine molecules polymerise together.