Question

Можете объяснить как решать такие задачи по биологии? Фрагмент цепи ДНК имеет следущую последовательность нуклеотидов: ЦТА-АЦТ-ЦТА-ТАГ. Опредилите последовательность нуклеотидов на иРНК, антикодоны соответствующих тРНК и аминокислотную последовательность соответствующего фрагмента молекулы белка, используя таблицу генетического кода.

Answer 1

Если действовать по правилу чаргаффа (а=т, г=ц) получается если из 1 цепи днк, делаем вторую цепт днк на твоем примере пишем 1цепь - цта ацт цта таг 2 цепь гат тга гат атц
т.е ,если "а" то пишем "т" если "т" то пишем "а", если "г" пишем "ц", если "ц", то пишем "г". надеюсь хоть немного помогла)

Answer 2

Solving the Biology Problem

To solve this biology problem, we need to determine the sequence of nucleotides in mRNA, the anticodons of tRNA, and the corresponding amino acid sequence of the protein fragment. We can use the genetic code table to find the answers.

The given DNA sequence is: CTA-ACT-CTA-TAG.

mRNA Sequence

To determine the mRNA sequence, we need to replace each DNA nucleotide with its complementary RNA nucleotide. In RNA, thymine (T) is replaced by uracil (U). Therefore, the mRNA sequence corresponding to the given DNA sequence is: GAU-UGA-GAU-AUC.

Anticodons of tRNA

The anticodons of tRNA are complementary to the codons in mRNA. To find the anticodons, we need to determine the complementary sequence of each codon in mRNA.

The mRNA sequence is: GAU-UGA-GAU-AUC.

The complementary sequence of each codon is as follows: - Codon: GAU; Complementary anticodon: CUA - Codon: UGA; Complementary anticodon: ACU - Codon: GAU; Complementary anticodon: CUA - Codon: AUC; Complementary anticodon: UAG

Therefore, the anticodons of tRNA corresponding to the given mRNA sequence are: CUA-ACU-CUA-UAG.

Amino Acid Sequence

To determine the amino acid sequence of the protein fragment, we need to use the genetic code table. Each codon in mRNA corresponds to a specific amino acid.

Using the genetic code table, we can find the amino acid corresponding to each codon in the mRNA sequence: - Codon: GAU; Amino acid: Aspartic Acid (Asp) - Codon: UGA; Amino acid: Stop Codon (Termination) - Codon: GAU; Amino acid: Aspartic Acid (Asp) - Codon: AUC; Amino acid: Isoleucine (Ile)

Therefore, the amino acid sequence of the protein fragment corresponding to the given DNA sequence is: Asp-Stop-Asp-Ile.

Conclusion

In summary, the given DNA sequence CTA-ACT-CTA-TAG corresponds to the mRNA sequence GAU-UGA-GAU-AUC, the anticodons of tRNA CUA-ACU-CUA-UAG, and the amino acid sequence of the protein fragment Asp-Stop-Asp-Ile.