A codon<span> is a three-base sequence (three nitrogen bases in a row) on mRNA. It calls for a specific amino acid to be brought to the growing polypeptide. An </span>anticodon<span> is a three-base sequence on tRNA. It matches the </span>codon<span>.</span>
Renal medulla
The renal medulla contains the renal pyramids, where urine formation takes place. Urine passes from the renal pyramids into the renal pelvis. This funnel-shaped structure occupies the central cavity of each kidney and then narrows as it extends out to join the ureter.
Answer:
A cell organelle that helps process and package proteins and lipid molecules.