Question

Фрагмент одного з ланцюгів ДНК має послідовність нуклеотидів : ТАЦ – ГТЦ – ТГГ – ААТ – ТГА – ТГГ – ТАГ. Яку послідовність має другий ланцюг ДНК? Яка молекулярна маса цієї молекули ДНК? Один ланцюг: ___ТАЦ – ГТЦ – ТГГ – ААТ – ТГА – ТГГ – ТАГ_______ Другий ланцюг: ________________________ Мr ДНК: _________________

Answer 1

Ответ:

АТГ-ЦАГ-АЦЦ-ТТА-АЦТ-АЦЦ-АТЦ

Answer 2

The sequence of the second DNA strand:

The sequence of the second DNA strand can be determined by applying the base pairing rules of DNA. In DNA, adenine (A) always pairs with thymine (T), and cytosine (C) always pairs with guanine (G). Therefore, the second DNA strand will have a complementary sequence to the given first DNA strand.

Given the sequence of the first DNA strand: ТАЦ – ГТЦ – ТГГ – ААТ – ТГА – ТГГ – ТАГ

The complementary sequence of the second DNA strand will be: АТГ – CАГ – АСС – ТТА – АСТ – АСС – АТС

Molecular mass of the DNA molecule:

The molecular mass of a DNA molecule is determined by the sum of the molecular masses of its individual nucleotides. Each nucleotide consists of a phosphate group, a sugar molecule (deoxyribose), and a nitrogenous base (adenine, thymine, cytosine, or guanine).

The molecular mass of the phosphate group is approximately 94.97 g/mol, the molecular mass of deoxyribose is approximately 134.13 g/mol, and the molecular masses of the nitrogenous bases are as follows: - Adenine (A): approximately 135.13 g/mol - Thymine (T): approximately 126.11 g/mol - Cytosine (C): approximately 111.10 g/mol - Guanine (G): approximately 151.13 g/mol

To calculate the molecular mass of the DNA molecule, we need to know the number of nucleotides in the sequence. Since the number of nucleotides is not provided in the question, we cannot determine the exact molecular mass of the DNA molecule without this information.

Please provide the number of nucleotides in the DNA sequence so that we can calculate the molecular mass accurately.