Given a gel electrophoresis result with bands at positions corresponding to ddATP, ddCTP, ddGTP, and ddTTP, how would you determine the DNA sequence?

• A. Read the bands from top to bottom to determine the sequence from 3' to 5'.
• B. Read the bands from left to right to determine the sequence from 5' to 3'.
• C. Read the bands from bottom to top to determine the sequence from 5' to 3'.
• D. Read the bands from right to left to determine the sequence from 3' to 5'.

Answer: (C)