Question

which of the following will be the most different? the proteins in a skin cell and a brain cell of the same human. the proteins in the skin cells of two different humans.

Explanation:

Cells of different types in the same individual (like skin and brain cells) have different functions and thus express different sets of proteins. While there are differences between the proteins in skin cells of different humans due to genetic variation, the functional - based differences between cell - types in the same individual are more pronounced.

Answer:

The proteins in a skin cell and a brain cell of the same human.