The DNA molecule contains 18% thymine nucleotides of the total number of nitrogenous bases.

The DNA molecule contains 18% thymine nucleotides of the total number of nitrogenous bases. Determine the amount of other nucleotides in this DNA molecule.

Adenine = thymine Cytosine uracil (triple bond) Let’s solve the problem with Chargoff’s rule A = T C = G (A + T) + (C + G) = 100% A = T; T = 18% by condition => A = 18% A + T = 18% + 18% A + T = 36% C = G 100% – (A + T) = G + C 100% -36% = 64% G = 64%: 2 G = 32% => C = 32%
Answer: A = 18%, T = 18%, C = 32%, G = 32%.



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