What are PCB’s and where in the body do Tomcods store PCB chemicals?

Polychlorinated biphenyls (PCBs) are a group of manmade chemicals. They are oily liquids or solids, clear to yellow in color, with no smell or taste. PCBs are very stable mixtures that are resistant to extreme temperature and pressure. PCBs were used widely in electrical equipment like capacitors and transformers. They also were used in hydraulic fluids, heat transfer fluids, lubricants, and plasticizers. The primary company that made PCBs in the United States was Monsanto Inc., mainly using the name Aroclor. Commercial production of PCBs ended in 1977 because of health effects associated with exposure. In 1979, the U.S. Environmental Protection Agency (USEPA) banned the use of PCBs; however, PCBs are still present in many pre-1979 products.

A is the correct answer. - Antibodies are polypeptides.

Antibodies are proteins made by B-Cells that are specific to the antigen of a foreign pathogen. Antibodies have to identical polypeptide chains that have a Y shape fold to hold down a specific antigen of the foreign pathogen.