Modern technology could be used to clone pet
dogs and cats. the cloned animals would resemble
the original pets because
(1) the genes of the new animals are different
from those of the original pets
(2) half of the genetic information of the new
animals is the same as that of the original
pets
(3) the new animals have mutations not found in
the original pets
(4) the new animals have the same genetic
information as the original pets

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.