Question

Последовательность нуклеотидов в цепи ДНК:—ГГТГЦТГААТАЦГГГА—.В результате мутации одновременно выпадают пятый нуклеотид и четвёртый триплет нуклеотидов. Запишите новую последовательность нуклеотидов в цепи ДНК. Определите по ней последовательность нуклеотидов в и-РНК и последовательность аминокислот в молекуле белка.

Answer 1

1) ДНК: ГГТ ГЦТ ГАА ТАЦ ГГГ А
2) после мутации: ГГТ     ГТГ    ААГ    ГГА
3) и-РНК:                ЦЦА   ЦАЦ  ТТЦ    ЦЦТ 
4) Аминокислоты определяешь по табличке

Answer 2

Sequence of Nucleotides in DNA:

The given sequence of nucleotides in the DNA chain is: GGTGTCTGAATACGGGA.

Mutation:

According to the question, the fifth nucleotide and the fourth triplet of nucleotides are simultaneously deleted.

New Sequence of Nucleotides in DNA:

To determine the new sequence of nucleotides in the DNA chain, we need to remove the fifth nucleotide (T) and the fourth triplet of nucleotides (TGA).

The new sequence of nucleotides in the DNA chain after the mutation is: GGTGTGAATACGGGA.

Sequence of Nucleotides in mRNA:

To determine the sequence of nucleotides in the mRNA, we need to perform transcription, which involves replacing thymine (T) with uracil (U).

The new sequence of nucleotides in the mRNA chain after transcription is: GGUGUGAAUACGGGA.

Sequence of Amino Acids in Protein:

To determine the sequence of amino acids in the protein, we need to perform translation, which involves reading the mRNA sequence in groups of three nucleotides (codons) and matching them to the corresponding amino acids using the genetic code.

Using the genetic code, we can determine the sequence of amino acids in the protein:

- GGU: Glycine (Gly) - GUG: Valine (Val) - AAU: Asparagine (Asn) - ACG: Threonine (Thr) - GGA: Glycine (Gly)

Therefore, the sequence of amino acids in the protein is: Gly-Val-Asn-Thr-Gly.

Please note that the genetic code is universal, meaning that the same codons code for the same amino acids in all organisms.