Eukaryotic cells regulate which proteins are made, and when, using many different cellular process. These processes can occur throughout the steps of protein production. For example, affect whether a gene gets transcribed from DNA to mRNA. , on the other hand blocks mRNA from being translated into a protein. In this regulatory process, miRNA strands that contain complementary sequences. The development of a multicellular organism is a particularly critical time for eukaryotic gene regulation. During development, many different regulatory process come into play. For example, master control genes, or , control the development of entire organs