The answer to the question is PCR
B. is the correct answer I think
Proteins are large, complex molecules that play many critical roles in the body. They do most of the work in cells and are required for the structure, function, and regulation of the body's tissues and organs. ... These proteins provide structure and support for cells. On a larger scale, they also allow the body to move.
Sitting<span> is sort of their default behavior and a lot of </span>panda<span> keepers seem to think that they prefer to be solitary.</span>
