The radius and ulna are the two bones that are located in the forearm. The forearm is the area of the upper limb, which extends from the elbow region to the wrist region in the arm.
Both of these bones provide lateral support to the hand as radius bone provides supports the region where thumb is present and ulna bone provides lateral support towards the region of the little finger.
Ribosomal RNA (rRNA) associates with a set of proteins to form ribosomes. These complex structures, which physically move along an mRNA molecule, catalyze the assembly of amino acids into protein chains.
As John is testing the effect of temperature on the solubility of sugar in water. To test this, he will measure the amount of sugar dissolved at different temperature level.