The DNA molecule contains 60,000 nucleotides, which include the nitrogenous base thymine.

The DNA molecule contains 60,000 nucleotides, which include the nitrogenous base thymine. 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 this DNA molecule.

Decision.
60,000 – 100%
X – 15%, X = 9000 – nucleotides T, according to Chargaff’s rule And also 9000.
Accordingly, 60,000 – (9000 + 9000) = 42000 C and G. C – 21000, G – 21000
according to Chargaff’s rule.
The length of one spiral turn is 10 pairs of nucleotides, which is 3.4 nm. IN
each chain is 30,000, since the chains are complementary.
This means that 30,000 / 10 = 3000 turns * 3.4 = 10200nm.