Question

1. which of the following protein sequences is coded for by the following mrna strand? augcaagauuga met - gln - asp - stop met - his - asp - stop met - gln - glu - stop tyr - thr - ser - leu

Explanation:

Step1: Divide mRNA into codons

The mRNA strand is AUGCAAGAUUUGA. Dividing it into triplet codons: AUG - CAA - GAU - UGA.

Step2: Look up amino - acid for each codon

• AUG codes for Methionine (Met).
• CAA codes for Glutamine (Gln).
• GAU codes for Aspartic acid (Asp).
• UGA is a stop codon.

Answer:

Met - Gln - Asp - Stop