[Campbell Biology P.514] Which of the following statements about noncoding DNA in multicellu... | Practice Question

Which of the following statements about noncoding DNA in multicellular eukaryotes is correct?

  • A: Pseudogenes and repetitive DNA constitute a small fraction, less than 5%, of the human genome.
  • B: Transposons move via an RNA intermediate, while retrotransposons move via a DNA intermediate.
  • C: Simple sequence DNA (STRs) is primarily found in gene-coding regions and plays a significant role in protein synthesis.
  • D: The most abundant type of repetitive DNA consists of transposable elements, including transposons and retrotransposons.

Explanation

The text states: 'The most abundant type of repetitive DNA in multicellular eukaryotes consists of transposable elements and related sequences. In eukaryotes, there are two types of transposable elements: transposons, which move via a DNA intermediate, and retrotransposons, which are more prevalent and move via an RNA intermediate.' This directly supports option D.