Within a DNA molecule, bonds between pairs of bases keep the two strands joined. At high temperatures, these bonds can be broken so that the DNA separates into two single strands. The base pair C and G is bonded more strongly than the base pair A and T. Two DNA molecules with the same total number of bases were examined. • In DNA molecule 1, 20% of the bases are T. • In DNA molecule 2, 20% of the bases are C. Which DNA molecule would need the lowest temperature to separate into single strands?
- ADNA molecule 1, because there are more A bases present.
- BDNA molecule 1, because there are more G bases present.
- CDNA molecule 2, because there are more A bases present.
- DDNA molecule 2, because there are more G bases present.