Question

the human pancreas contains beta cells that produce the hormone insulin, which regulates sugar levels in the blood. why is the production of insulin limited to the pancreas?○ the gene coding for insulin is only present in the beta cells of the pancreas.○ the gene coding for insulin is only expressed in the beta cells of the pancreas.○ the gene coding for insulin has a different nucleotide sequence in other cells of the body than it does in beta cells of the pancreas.○ the gene coding for insulin replicates into mrna in all cells but can only be transcribed into protein in beta cells of the pancreas.

Explanation:

All somatic cells in the human body contain the same full set of genes, including the insulin gene. Gene expression is regulated, meaning not all genes are active in every cell. The insulin gene is specifically expressed (transcribed and translated) only in pancreatic beta cells because these cells have the specific transcription factors and regulatory mechanisms to activate this gene, while other cells do not. The other options are incorrect: the insulin gene is present in all cells, has the same nucleotide sequence across cells, and is not transcribed into mRNA in all cells.

Answer:

The gene coding for insulin is only expressed in the beta cells of the pancreas.