Select all the job(s) of the membrane: house genetic material
communication between cells
exchange of materials
energy
signal replication when neighboring cells missing

Amino acids contain the elements carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. of the 20 amino acids found in humans, 11 are called "nonessential" because they can be manufactured by the body when needed. which elements in these 11 amino acids are commonly obtained from the metabolism of sugar molecules?