A DNA sample run alongside a size ladder produces two visible bands.
Approximately what fragment sizes does the sample contain?
- A
Both bands are below 0.2 kb
- Bcheck_circle
About 6 kb and about 0.5 kb
- C
Cannot estimate without sequence data
- D
Both bands are 10 kb
Explanation
DNA migrates toward the positive electrode; smaller fragments travel farther. Comparing to the ladder, the sample bands fall between 5-10 kb (<del>6 kb) and between 1-0.2 kb (</del>0.5 kb).