We refer to the dna code as being redundant or repetitive. this means that
a) each triplet codes for a different amino acid.
b) a single triplet may code for more than one amino acid.
c) one codon codes for one amino acid.
d) some codons code for the same amino acid.
e) each triplet codes for one amino acid.

You have just sequenced a new protein found in mice and observe that sulfur-containing cysteine residues occur at regular intervals. what is the significance of this finding? it will be important to include cysteine in the diet of the mice. cysteine residues are required for the formation of α helices and β pleated sheets. cysteine residues are involved in disulfide bridges that form tertiary structure. cysteine causes bends, or angles, to occur in the tertiary structure of proteins.