Determine the total number of nucleotides of a DNA molecule if its one strand consists

| August 12, 2021 | education

Determine the total number of nucleotides of a DNA molecule if its one strand consists of 350 guanine and 300 thymine nucleotides.

The number of certain nucleotides in a DNA molecule depends on the principle of complementarity: adenine (A) corresponds to thymine (T), guanine (G) to cytosine (C). The number of complementary nucleotides is always equal. According to the condition of the problem, the DNA fragment contains 350 guanine and 300 thymine nucleotides. According to the principle of complementarity, the cytosine in this fragment will be the same as guanine – 350, and 300 adenine. It turns out that on one DNA strand 350 +350 +300 + 300 = 1300 nucleotides. But the DNA chain is double, it turns out that there will be twice as many nucleotides in this fragment: 1300 * 2 = 2600.
Answer: 2600 nucleotides.



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