Question

Some proteins are composed of two or more polypeptides. Suppose the DNA template strand sequence 3'- TACGTAGGCTAACGGAGTAAGCTAACT -5' produces a polypeptide that joins in pairs to form a functional protein.

a) What is the amino acid sequence of the polypeptide produced from this sequence?

Answer 1

Met-his-Pro-Ile-ala-Ser-ala-asp

Step-by-step explanation:

The protein molecules are synthesized from the mRNA molecule synthesized from the DNA by the transcription. The translation process then translates the mRNA to the amino acids which then join together and form the proteins.

In the given question, the template strand of the DNA is provided is

Template DNA- 3'- TAC-GTA-GGC-TAA-CGG-AGT-AAG-CTA-ACT -5

mRNA- 5'-AUG-CAU-CCG-AUU-GCC-UCA-UUC-GAU-UGA-3'

Protein- Met-his-Pro-Ile-ala-Ser-ala-asp-stop codon

The translation process begins when the tRNA molecule recognizes the AUG or start codon and then reads the nucleotide in the triplets. Each triplet code for the specific amino acid.On the basis of this, amino acid chain is constructed.

Thus, Met-his-Pro-Ile-ala-Ser-ala-asp is correct.