7. The general structural and functional differences between a nerve and smooth muscle cell within an individual are a result of


(A) the genome (DNA in a cell) being different between muscle and nerve cells.

(B) the proteome (proteins in a cell) that differ between muscle and nerve cells.

(C) the relative amounts of certain proteins between muscle and nerve cells.

(D) the genome and the relative amounts of certain proteins that differ between muscle and nerve cells.

(E) the proteome and the relative amounts of certain proteins that differ between muscle and nerve cells