Which of the following polypeptides is coded for by the mRNA sequence 5'AUGGUUAAACGACAAUCC3'?

Answer 1

To determine which polypeptide is coded for by the given mRNA sequence, we need to translate the mRNA into amino acids using the genetic code.

The mRNA sequence provided is: 5' - AUG GUU AAA CGA CAA UCC - 3'

We can break this sequence down into codons (groups of three nucleotides):

• AUG
• GUU
• AAA
• CGA
• CAA
• UCC

Next, we will translate each codon into its corresponding amino acid:

1. AUG - Methionine (Met), also the start codon.
2. GUU - Valine (Val).
3. AAA - Lysine (Lys).
4. CGA - Arginine (Arg).
5. CAA - Glutamine (Gln).
6. UCC - Serine (Ser).

Now we can assemble the polypeptide chain:

• Met - Val - Lys - Arg - Gln - Ser

Therefore, the polypeptide coded by the given mRNA sequence is: Methionine-Valine-Lysine-Arginine-Glutamine-Serine.