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Multiple Choice
In what way is the DNA of a nerve cell different from the DNA of a muscle cell?
A
The DNA in nerve cells is identical to that in muscle cells, but different genes are expressed.
B
Nerve cells contain RNA instead of DNA.
C
Nerve cells have more chromosomes than muscle cells.
D
The DNA sequence is different in nerve cells compared to muscle cells.
Verified step by step guidance
1
Understand that DNA is the genetic material found in almost all cells of an organism, and it carries the instructions for the development, functioning, growth, and reproduction of all known living organisms.
Recognize that all cells in a multicellular organism, such as humans, typically contain the same DNA sequence. This means that the DNA in nerve cells is identical to the DNA in muscle cells.
Learn about gene expression, which is the process by which information from a gene is used to synthesize functional gene products like proteins. Different cell types express different sets of genes, which leads to their unique functions and characteristics.
Consider the role of RNA in cells. While DNA is the same in nerve and muscle cells, RNA is involved in translating the genetic code into proteins. RNA is synthesized from DNA and varies between different cell types based on which genes are being expressed.
Conclude that the differences between nerve cells and muscle cells are due to the expression of different genes, not differences in the DNA sequence itself. This is a fundamental concept in understanding cellular differentiation and function.