Messenger RNA (mRNA) is a large family of RNA molecules that convey genetic information from DNA to the ribosome, where they specify the amino acid sequence of the protein products of gene expression.
Parathyriod glands produce a parathyriod hormone aka PTH
A. Metabolism this is the process of taking food and making it energy
Which of what? I need more information to decipher that.
It will be Control. Part of the experiment used to show that the results of an experiment is really due to the conditions being tested.