Question 7

[wesley.pau5578]

Your explanation makes sense. And, the question is just talking about "muscle cells" and doesn't specify what type. However, doesn't a skeletal muscle cell have more than one nuclei? So would it make sense that because each nuclei has the same DNA content, but the skeletal muscle cell has more nuclei than the hepatocyte, that the skeletal muscle cell will have a greater amount of DNA?

[calena7178147]

All cells within an organism have the same genetic material. However, gene expression differs between cell types.

The question does not specify which type of muscle cell is being compared to a hepatocyte, and thus even if you thought about a skeletal muscle cell, the answer should still be D since it is the best answer.

Now, in terms of skeletal muscle, even though the question does not ask about it:

Skeletal muscle is made up of thousands of cylindrical muscle fibers, bound together by connective tissue through which run blood vessels and nerves.

Each muscle fiber contains many nuclei. The multiple nuclei arise from the fact that each muscle fiber develops from the fusion of many cells (called myoblasts). A single muscle cell (myoblast) contains one nucleus, and therefore will not have a greater amount of DNA than a hepatocyte.