Glycine is a found in rigid portions of the protein b found

Glycine is

a) found in rigid portions of the protein

b) found at active sites of enzymes

c) found in tight curves

d) polar but non-ionized at physiological pH

Solution

glycine is found in tight curves.

Glycine does not have a side chain and for this reason it is not straight forward to assign it and so that it has the ability to fit into tight spaces of molecules where no other amino acid could possibly fit.Generally, glycine is often found at the surface of proteins,within loop or coil regions,providing high flexibility to the polypeptide chain at these locations.