# The DNA molecule contains 60,000 nucleotides, which include the thymine nitrogen base. These nucleotides make up 15%

The DNA molecule contains 60,000 nucleotides, which include the thymine nitrogen base. These nucleotides make up 15% of the total number of nucleotides in the molecule. Determine the number of other types of nucleotides and the length of a given DNA molecule.

Decision.
60,000 – 100%
X – 15%, X = 9000 – nucleotides of T, according to the rule of Chargaff A also 9000.
Accordingly, 60,000 – (9000 + 9000) = 42000 C and G. C – 21000, G – 21000 according to the rule of Chargaff.
The length of one coil of the helix is 10 pairs of nucleoleotides and this is 3.4 nm. There are 30,000 in each chain, since the chains are complementary.
Therefore, 30,000 / 10 = 3,000 turns * 3.4 = 10,200 nm.

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