which of the statements about amino acids is correct? a turn or kink in a protein is more likely to be induced by a glycine than by a proline. at typical cellular ph, the r groups of basic amino acids are negatively charged. the bridge between cysteines, which connects parts of a protein, is a stable covalent interaction. the more asparagines that are found in a polypeptide's primary sequence, the more flexible the backbone of that polypeptide. every amino acid is asymmetric.