Question

pancreatic tissue under a microscope
complete the paragraph.
in humans, skeletal muscle cells and pancreatic beta cells contain dna. the gene for myoglobin production is in skeletal muscle cells and in pancreatic beta cells. dna contains the instructions for making myoglobin. dna does not hold instructions to make proteins, but it does help regulate whether the myoglobin gene is activated or inactivated in each type of cell.

Explanation:

All somatic cells in humans have the same DNA. However, gene expression is cell - specific. Myoglobin is a protein important for oxygen - storage in muscle cells. So, the myoglobin gene is activated in skeletal muscle cells where it is needed for function, and inactivated in pancreatic beta cells which have different functions and do not require myoglobin production.

Answer:

In humans, skeletal muscle cells and pancreatic beta cells contain the same DNA. The gene for myoglobin production is activated in skeletal muscle cells and inactivated in pancreatic beta cells. The myoglobin - producing DNA contains the instructions for making myoglobin. The non - myoglobin - producing DNA does not hold instructions to make proteins, but it does help regulate whether the myoglobin gene is activated or inactivated in each type of cell.