Yes and no, during solar flares they don't appear to, but in normal lighting conditions the groups are clearly visible.
A carboxyl group (-COOH) functions as an organic acid (deprotonate to -COO-). An amino group (-NH2) may function as an organic base (protonated to -NH3+). Therefore an organic compound that has a...
Yes
The amino acid, monomeric unit of proteins.
amino acids
protein structures Any molecule containing a carboxyl and an amino group is called an amino acid.