Final answer:
The genetic code is stored in the nucleus of a cell, which contains most of the cell's genetic information encoded in DNA in the form of genes.
Step-by-step explanation:
The genetic code is stored in the nucleus of a cell.
The nucleus is a membrane-enclosed organelle that contains most of the cell's genetic information. This genetic information is encoded in DNA in the form of genes. Each gene is a short segment of DNA that contains information to encode an RNA molecule into a protein strand.
The function of the nucleus is to maintain the integrity of these genes and to control the activities of the cell by regulating gene expression, which is the process by which the information in a gene is "decoded" to produce a functional gene product, such as a protein molecule.