Which of the following is a role of magnesium in the body?

Magnesium plays several critical roles in the body, making the choice that encompasses all these functions the most accurate. Specifically, magnesium is essential for DNA synthesis, as it acts as a cofactor for enzymes involved in the replication and repair of DNA. Additionally, magnesium is vital for cell signaling processes, where it influences the actions of various signaling pathways and is integral to the functioning of G-proteins, which are activated by magnesium ions. Furthermore, magnesium is involved in protein synthesis, since it is a cofactor for the ribosome and helps in the translation of messenger RNA into proteins. Given that magnesium contributes to these key functions—DNA synthesis, cell signaling, and protein synthesis—choosing an option that includes all of them accurately reflects its multifaceted role in human physiology.