Question

Помогите пожалуйста , очень нужно !!!! Определить какие изменения происходят в строении белка если выпадет А)третий триплет.Б)третий нуклеотид . В) если третий нуклеотид в каждом триплете . В каком случае существенные изменения ТАЦ-АГА-ТГГ-АТГ-ЦГЦ

Answer 1

Исходная цепь ТАЦ ЦГТ ЦГА ТЦГ АТГ
и - РНК АУГ ГЦА ГЦУ АГЦ УАЦ
белок метионин-аланин-аланин-серин-тирозин
мутационная цепь ТЦЦ ГТЦ ГАТ ЦГА ТГ
и - РНК АГГ ЦАГ ЦУА ГЦУ АЦ
белок аргинин-глутамин-лейцин-аланин

Answer 2

Protein Structure Changes Due to Alterations in DNA Sequence

When a change occurs in the DNA sequence, it can lead to various alterations in the structure of the resulting protein. Let's examine the specific scenarios you've mentioned.

A) If the third triplet is lost: If the third triplet in the DNA sequence is lost, it would lead to a frameshift mutation, causing a significant change in the entire sequence of amino acids in the resulting protein. This is because the reading frame would be shifted, leading to a completely different sequence of codons being read. As a result, the protein's structure and function would be greatly affected.

B) If the third nucleotide in each triplet is altered: Changing the third nucleotide in each triplet would result in a different amino acid being incorporated into the protein. This alteration could lead to a change in the protein's structure and function, depending on the specific amino acid that is now incorporated.

C) If the third nucleotide in each triplet is the same: If the third nucleotide in each triplet is the same, it would not necessarily lead to a significant change in the resulting protein. This is because the redundancy of the genetic code allows for different codons (triplets) coding for the same amino acid. Therefore, the protein's structure and function may remain relatively unchanged in this scenario.

In the given DNA sequence "ТАЦ-АГА-ТГГ-АТГ-ЦГЦ," the potential alterations in the third nucleotide of each triplet could lead to significant changes in the resulting protein structure and function, as discussed above.

It's important to note that these changes in the DNA sequence can have profound effects on the resulting protein, impacting its functionality and potentially leading to various genetic disorders or abnormalities.

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