3. the two ends of a strand of dna are called the
a. codon and the anticodon, based on the order of the deoxyribose sugars and the phosphate groups.
b.5' and the 3' end, based on modifications in the deoxyribose sugar,
c. starting end and the ending end, based on the orientation of the dna within the chromosome
od. sense end and the antisense end, based on the location of the phosphate groups

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.