Question

Относительная молекулярная масса одной цепи ДНК составляет 68310.Определить число нуклеотидов, если молекулярная масса одного нуклеотида 345, определить длину ДНК, если длина одного нуклеотида равна 0,34 нм.

Answer 1

Решение
1)68310/345=198 нуклеотидов
2) 198*0,34=67,32 нм
Ответ:198 нуклеотидов. длина 67,32 нм

Answer 2

Calculation of the Number of Nucleotides

To determine the number of nucleotides in a DNA chain, we can use the formula:

Number of nucleotides = Molecular mass of DNA chain / Molecular mass of one nucleotide

Given that the molecular mass of one nucleotide is 345 and the molecular mass of the DNA chain is 68310, we can substitute these values into the formula:

Number of nucleotides = 68310 / 345

Calculating this, we find:

Number of nucleotides = 198

Therefore, the DNA chain consists of 198 nucleotides.

Calculation of the Length of DNA

To calculate the length of the DNA chain, we can use the formula:

Length of DNA = Number of nucleotides * Length of one nucleotide

Given that the length of one nucleotide is 0.34 nm and we have already determined that the number of nucleotides is 198, we can substitute these values into the formula:

Length of DNA = 198 * 0.34 nm

Calculating this, we find:

Length of DNA = 67.32 nm

Therefore, the length of the DNA chain is 67.32 nm.

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