Which of the following codons acts as a stop signal?

The translation termination signal is ......... .

Identify the amino acid sequence coded by the given $mRNA$ sequence: $5'-AUG-UUU-UUC-GUG-AUA-UGG-3'$

The exon part of $m-RNA$ contains the code for:

The production of human proteins in bacteria through genetic engineering is possible because:

The chemical method developed by which of the following scientists was instrumental in synthesizing $\text{RNA}$ molecules with defined combinations of nitrogen bases?