Insulin is needed to regulate sugar levels in the blood. While every cell in the body contains genes for the production of insulin, it is only produced by a specialized subset of cells in the pancreas. Therefore:
A. every cell must regulate its own sugar
production.
B. the genes for insulin production must be
mutated except in the specialized cells of the
pancreas.
C. there must be mechanisms of gene
regulation that promote insulin expression in
the specialized pancreatic cells and prevent
insulin expression in all other cells.
D. only the specialized cells of the pancreas
have functional genes for insulin production.
E. insulin production is not regulated because
the genes for it are present in every cell.
C
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