Question

Фрагмент ДНК має такий склад: ЦТА – АЦГ – ТАТ – АЦА – ТЦЦ -ААА . Добудуйте другий ланцюг ДНК та відповідну йому і – РНК, та визначте процентний вміст нуклеотидів в молекулі ДНК, довжину та молярну масу ДНК. Візначити кількість амінокислот в молекулі білка.

Answer 1

Ответ:

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Answer 2

Ответ:

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Объяснение:

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Answer 3

DNA Fragment Composition and Building the Second DNA Strand

The given DNA fragment has the following composition: CTA - ACG - TAT - ACA - TTC - AAA. To build the second DNA strand, we need to find the complementary base pairs for each nucleotide in the given fragment. The complementary base pairs are as follows:

- C pairs with G - T pairs with A - A pairs with T - G pairs with C

Using this information, we can build the second DNA strand:

GAT - TGC - ATA - TGT - AAG - TTT

Building the Corresponding RNA Strand

To build the corresponding RNA strand, we need to replace each occurrence of the nucleotide T with U (uracil). Therefore, the corresponding RNA strand for the given DNA fragment is:

GAU - UGC - AUA - UGU - AAG - UUU

Percentage Content of Nucleotides in the DNA Molecule

To determine the percentage content of nucleotides in the DNA molecule, we need to calculate the frequency of each nucleotide and divide it by the total number of nucleotides. In the given DNA fragment, we have a total of 18 nucleotides. Here is the breakdown:

- Adenine (A): 4 nucleotides - Cytosine (C): 3 nucleotides - Guanine (G): 3 nucleotides - Thymine (T): 4 nucleotides

To calculate the percentage content, we divide the number of each nucleotide by the total number of nucleotides and multiply by 100:

- Percentage of Adenine (A): (4/18) * 100 = 22.22% - Percentage of Cytosine (C): (3/18) * 100 = 16.67% - Percentage of Guanine (G): (3/18) * 100 = 16.67% - Percentage of Thymine (T): (4/18) * 100 = 22.22%

Length and Molar Mass of the DNA Molecule

The length of the DNA molecule can be determined by counting the number of nucleotides. In the given DNA fragment, we have a total of 18 nucleotides, so the length of the DNA molecule is 18 base pairs.

To calculate the molar mass of the DNA molecule, we need to consider the molecular weight of each nucleotide. The molecular weights of the nucleotides are as follows:

- Adenine (A): 331.2 g/mol - Cytosine (C): 307.2 g/mol - Guanine (G): 347.2 g/mol - Thymine (T): 322.2 g/mol

To calculate the molar mass of the DNA molecule, we sum the products of the number of each nucleotide and its molecular weight:

Molar mass = (4 * 331.2) + (3 * 307.2) + (3 * 347.2) + (4 * 322.2) = 4779.6 g/mol

Therefore, the molar mass of the DNA molecule is 4779.6 g/mol.

Number of Amino Acids in the Protein Molecule

The given question does not provide any information about the protein molecule, so it is not possible to determine the number of amino acids in the protein molecule based on the given DNA fragment. Additional information about the protein molecule is needed to calculate the number of amino acids.