Final answer:
Zinc functions as a co-enzyme in the synthesis of the heme portion of hemoglobin and is essential for red blood cell formation.
Step-by-step explanation:
Zinc, a trace mineral, plays a crucial role in various bodily functions, including acting as a co-enzyme that facilitates the synthesis of the heme portion of hemoglobin. This makes zinc essential for the proper function and formation of red blood cells.
Additionally, zinc is important for immune system function, cell growth, and protein synthesis. While zinc is involved in the synthesis, storage, and release of insulin and plays a vital role in hemoglobin synthesis, it is not directly related to the synthesis of Vitamin C, melanin, or other substances not specified in the question.