There is about 1,000 times as much DNA in a human cell as in an E. coli cell but only about 5 times as many genes. What accounts for this discrepancy?

• A. The DNA packing is much more complex in a prokaryotic cell.
• B. Most of the genes in a human cell are turned off.
• C. E. coli bacteria are less able to respond to their environment than humans.
• D. Human cells are much larger than E. coli cells.
• E. A human cell has much more noncoding DNA.