[Campbell Biology P.499] Based on the provided text, which statement accurately describes a ... | Practice Question

Based on the provided text, which statement accurately describes a difference between human and bacterial genomes?

  • A: Bacterial genes are significantly longer on average due to the absence of introns.
  • B: Human genomes contain 1,000 times more noncoding DNA than bacterial genomes.
  • C: The presence of introns contributes to human genes being much longer than bacterial genes.
  • D: Noncoding DNA makes up a larger proportion of bacterial genomes than human genomes.

Explanation

The text states: 'introns account for most of the difference in average length between human genes 27,000 base pairs and bacterial genes 1,000 base pairs '. This confirms that introns contribute to human genes being significantly longer than bacterial genes. Additionally, humans have '10,000 times as much noncoding DNA as bacteria'.