A codon is a group of three mRNA bases while an anticodon is a group of three tRNA bases. For example AUC is a codon and UAG is an anticodon that matches it.
The reason that this question is being questioned by the nurse to the patient is because of the reason that the nurse wants to know the quality of pain that the patient is exhibiting in which the nurse would likely ask the patient of how much pain she or he exhibits from the scale 0-10.
