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The amino acid serine is coded by the mRNA codon AGU. What is the base sequence of the DNA gene that originally produced this mRNA codon?

TCA
TCC
AGU
UCA

Respuesta :

A, TCA. Using the corresponding bases working backwards, A becomes T, G becomes C and U becomes A. Hope this helps

A codon is a triplet of nucleotides synthesized from the complementary DNA strand. The base sequence of the DNA gene that originally produced the AGU mRNA codon is TCA.

  • During transcription, a fragment of DNA (e.g., a gene) is used as a template to synthesize a complementary RNA sequence, usually a messenger RNA (mRNA) sequence.

  • Subsequently, this mRNA sequence is then used as a template to create a polypeptide chain by a process known as translation.

  • According to the base pair rules, Adenine pairs with Thymine, whereas Guanine pairs with Cytosine.

  • In RNA, Thymine bases are replaced by Uracil bases.

In conclusion, the base sequence of the DNA gene that originally produced the AGU mRNA codon is TCA.

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