Question

Белок состоит из 100 аминокислот. Установите, во сколько раз молекулярная масса участка гена, кодирующего данный белок, превышает молекулярную массу белка, если средняя молекулярная масса аминокислоты – 110, а нуклеотида — 300. Ответ поясните.

Answer 1

Ответ:

Одна аминокислота кодируется тремя нуклеотидами (одним триплетом). Таким образом белок кодируется 300 нуклеотидами.

Масса белка составляет;

100×110=11000.

Масса участка гена составляет:

300×300=90000.

Таким образом масса гена больше массы белка в:

90000/11000=8,18 раз.

Answer 2

Calculating the Molecular Mass Discrepancy

To calculate the molecular mass discrepancy between the gene segment and the encoded protein, we can use the given information.

Given: - Length of the protein = 100 amino acids - Average molecular mass of an amino acid = 110 - Molecular mass of a nucleotide = 300

First, we need to calculate the molecular mass of the protein and the gene segment.

Molecular Mass of the Protein: The molecular mass of the protein can be calculated by multiplying the average molecular mass of an amino acid by the number of amino acids in the protein.

Molecular mass of the protein = 100 amino acids * 110

Molecular Mass of the Gene Segment: The molecular mass of the gene segment can be calculated by multiplying the molecular mass of a nucleotide by the number of nucleotides in the gene segment. Since each amino acid is encoded by 3 nucleotides, we can calculate the number of nucleotides in the gene segment by multiplying the number of amino acids by 3.

Number of nucleotides in the gene segment = 100 amino acids * 3 Molecular mass of the gene segment = (100 amino acids * 3) * 300

Now, we can compare the molecular mass of the gene segment to the molecular mass of the protein to determine the discrepancy.

Calculation

- Molecular mass of the protein = 100 amino acids * 110 = 11000 - Number of nucleotides in the gene segment = 100 amino acids * 3 = 300 - Molecular mass of the gene segment = (100 amino acids * 3) * 300 = 90000

Conclusion

The molecular mass of the gene segment, which encodes the given protein, is 8.18 times greater than the molecular mass of the protein.

This calculation demonstrates the discrepancy in molecular mass between the gene segment and the encoded protein, highlighting the complexity of genetic information and protein synthesis.