Question

ЗАДАЧА. Участок молекулы ДНК имеет следующую последовательность нуклеотидов:ТАЦ-ГАТ-ЦГА-ЦТА-ЦГА-АТТ.Постройте участок иРНК транскрибируемый на этой молекуле ДНК.Сколько кодонов он включает?

Answer 1

УАЦ-ГАУ-ЦГА-ЦУА-ЦГА-АУУ-иРНК

Answer 2

Transcription of DNA and Codon Count

To transcribe the given DNA sequence and determine the number of codons it includes, we need to understand the process of transcription and the genetic code.

Transcription is the process by which the DNA sequence is used as a template to synthesize a complementary RNA molecule. During transcription, the DNA sequence is transcribed into a messenger RNA (mRNA) molecule. The mRNA carries the genetic information from the DNA to the ribosomes, where it is used as a template for protein synthesis.

The genetic code is a set of rules that determines how the sequence of nucleotides in mRNA is translated into the sequence of amino acids in a protein. The genetic code is read in groups of three nucleotides called codons. Each codon corresponds to a specific amino acid or a stop signal.

Now, let's transcribe the given DNA sequence and determine the number of codons it includes.

The given DNA sequence is: ТАЦ-ГАТ-ЦГА-ЦТА-ЦГА-АТТ.

To transcribe this DNA sequence into mRNA, we need to replace each DNA nucleotide with its complementary RNA nucleotide. The complementary RNA nucleotides are as follows:

- Adenine (A) in DNA pairs with Uracil (U) in RNA. - Thymine (T) in DNA pairs with Adenine (A) in RNA. - Cytosine (C) in DNA pairs with Guanine (G) in RNA. - Guanine (G) in DNA pairs with Cytosine (C) in RNA.

Transcribing the given DNA sequence, we get the following mRNA sequence: АУГ-КАУ-ГКУ-ГАУ-ГКУ-УАА.

Now, let's count the number of codons in this mRNA sequence. Since each codon consists of three nucleotides, we can count the number of codons by dividing the length of the mRNA sequence by 3.

The length of the mRNA sequence is 15 nucleotides. Dividing 15 by 3, we find that the mRNA sequence includes 5 codons.

Therefore, the mRNA transcribed from the given DNA sequence includes 5 codons.