The DNA molecule contains 23% of adenyl nucleotides of the total number of nucleotides. Determine the amount of thymidyl and cytosyl nucleotides
1. According to Chargaff’s rule, we find the content of thymidyl nucleotides in a given DNA molecule: A = T = 23%.
2. Find the sum (in%) of the content of adenyl and thymidyl nucleotides in a given DNA molecule: 23% + 23% = 46%.
3. Find the sum (in%) of the content of guanyl and cytosyl nucleotides in a given DNA molecule: 100% – 46% = 54%.
4. According to Chargaff’s rule, in the DNA molecule G = C, in total they account for 54%, and separately: 54%: 2 = 27%.
Answer: T = 23%; C = 27%
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