Final answer:
The mRNA in your skin cells and muscle cells is different. Different types of cells use different sets of genes to make different proteins, resulting in cells with different structures and functions.
Step-by-step explanation:
Cells in multicellular organisms are specialized and have different characteristics. The mRNA in your skin cells and muscle cells is different.
Although each cell in your body contains the same DNA sequences, only a small subset of genes are expressed in any given cell. This means that different types of cells use different sets of genes to make different proteins, resulting in cells with different structures and functions.