Answer :
Final answer:
The molecular weight of the DNA sample cannot be determined with the given options.
Explanation:
The molecular weight of a DNA sample can be determined using the formula:
Molecular weight = (count of "A")*313.21 + (count of "T")*304.2 + (count of "C")*289.18 + (count of "G")*329.21 - 61.96
Using the given molecular masses:
- A - 3.0 x 10⁷ g/mol
- B - 4.5 x 10⁶ g/mol
- C - 6.2 x 10⁸ g/mol
- D - 8.9 x 10⁹ g/mol
None of the given options match the calculated molecular weight, so it is not possible to determine the correct answer based on the provided information.