The genetic code is present on ........

Which of the following amino acids is coded by a single codon?

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

Which one of the following pairs of codons is correctly matched with their function or the signal for the particular amino acid?

$A$ polypeptide is produced as dictated by $mRNA$. The number of bases on the $mRNA$ that code for the polypeptide portion containing the $N$-terminal amino acid and the next $13$ amino acids is:

If an $RNA$ sequence has $999$ bases and codes for a protein with $333$ amino acids,and the base at position $901$ is deleted,resulting in a sequence of $998$ bases,how many codons will be altered?