All cells contain the same compliment of DNA. However, adipose tissue cells and gastrointestinal epithelial cells are not composed of the same proteins. The differences in these cells, as well as all other cells, is most likely a result of differences in which of the following?
A) DNA sequences
B) mRNAs
C) quantity of DNA in their nuclei
D) rRNAs
E) tRNAs

Question

Quizplus · Accepted Answer

The differences in proteins between adipose tissue cells and gastrointestinal epithelial cells are due to differences in mRNA expression, which determines which proteins are synthesized.  The differentiation of cells into specific types, such as adipocytes and intestinal enterocytes, is the result of the pattern of genes that are allowed to be expressed in each cell type. This means that each distinct type of cell contains a unique and distinct set of mRNAs, directing the synthesis of cell-type specific proteins.

All Cells Contain the Same Compliment of DNA