Certified Dietary Manager (CDM) Practice Exam

Trace minerals, also known as microminerals, are essential nutrients that our bodies require in very small amounts to maintain various physiological functions. Among the provided options, zinc is recognized as a trace mineral due to its critical role in numerous biological processes. It is involved in immune function, protein synthesis, wound healing, DNA synthesis, and cell division. The body only needs a small amount of zinc, making it classified as a trace mineral.

Calcium, iron, and magnesium, while also essential nutrients, are categorized as major minerals. Calcium is vital for bone health and various bodily functions, iron is crucial for hemoglobin formation and transporting oxygen in the blood, and magnesium plays a significant role in over 300 enzymatic reactions in the body. These minerals are required in larger quantities compared to trace minerals like zinc. Thus, in this context, zinc stands out as the correct answer for a trace mineral.