[Campbell Biology P.446] Which of the following statements about the DNA in one of your brai... | Practice Question

Which of the following statements about the DNA in one of your brain cells is true when compared to one of your liver cells?

  • A: Most of the DNA codes for protein.
  • B: The majority of genes are likely to be transcribed.
  • C: It is the same as the DNA in one of your liver cells.
  • D: Each gene lies immediately adjacent to an enhancer.

Explanation

All somatic cells within an individual typically contain the exact same DNA sequence. Differences in cell type and function arise from differential gene expression, meaning different sets of genes are turned on or off in different cells, not from differences in the DNA itself.