To determine which amino acid is not part of the mRNA chain AAC GUA GGA GGU UGA, we need to first translate the mRNA sequence into its corresponding amino acids based on the genetic code.
The mRNA sequence can be divided into codons (three-nucleotide sequences):
- AAC
- GUA
- GGA
- GGU
- UGA
Now we translates each codon:
- AAC codes for Asparagine (Asn)
- GUA codes for Valine (Val)
- GGA codes for Glycine (Gly)
- GGU also codes for Glycine (Gly)
- UGA is a stop codon and does not code for an amino acid, but is important because it indicates termination of translation.
Now looking at the options provided:
a. Proline - Not encoded by the mRNA sequence. b. Glycine - Yes, coded by GGA and GGU. c. Valine - Yes, coded by GUA. d. Asparagine - Yes, coded by AAC.
The amino acid that is NOT part of the mRNA chain is a. Proline.
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